Apple MacBook Pro 17 – How to replace the DC Board or MacBook pro 17

Apple MacBook Pro 17:  HOW TO REPLACE THE CD BOARD 

Remove the following ten screws securing the lower case to the upper case:
Three 13.5 mm Phillips screws.
Seven 3 mm Phillips screws.

Wedge your fingers between the lower case and the vent, and lift upward to release the clips holding the lower case to the upper case.

Remove the lower case.

Whenever working near the logic board, it is always wise to first disconnect the battery to avoid short circuits.

If present, grab the plastic tab attached to the battery connector and pull it toward the front edge of the device. For Late-2011 models the battery connector will not have a tab and is simply a plug that inserts straight down into the motherboard--to remove pry the plug straight up.
If the plastic tab is missing, use a spudger to pry the connector up from its socket.
Pull the tab parallel to the face of the logic board.

Use the flat end of a spudger to lift the right fan connector out of its socket on the logic board.
It is useful to twist the spudger axially from beneath the fan cable wires to release the connector.
The fan socket and the fan connector can be seen in the second and third pictures. Be careful not to break the plastic fan socket off the logic board as you use your spudger to lift the fan connector straight up and out of its socket. The layout of the logic board shown in the second picture may look slightly different than your machine but the fan socket is the same.

Remove the three 3.1 mm Phillips screws securing the right fan to the logic board.

In the Late 2011 MacBook Pro 17" Unibody these screws will be T6 Torx.

Remove the right fan from the upper case, minding its cable that may get caught.
Use the flat end of a spudger to lift the left fan connector out of its socket on the logic board. It is useful to twist the spudger axially from beneath the fan cable wires to release the connector.

Remove the three 3.1 mm Phillips screws securing the left fan to the logic board.
Remove the left fan from the upper case, minding its cable that may get caught.

Use the tip of a spudger or your fingernail to flip up the retaining flap on the keyboard backlight ribbon cable.
Be sure you are prying up on the retaining flap, not the socket itself.
Pull the keyboard backlight ribbon cable out of its socket.

Before disconnecting the camera cable, a small plastic retainer stuck to the logic board must first be moved out of the way.
Use the tip of a spudger to push the small plastic cable retainer away from the camera cable socket for enough clearance to remove the camera cable.
Pull the camera cable toward the optical drive opening to disconnect it from the logic board.
The camera cable socket is very fragile. Do not apply any upward force to this socket, as it may break off the logic board. Pull the camera cable parallel to the face of the logic board.

Use the flat end of a spudger to pry the optical drive connector up and out of its socket on the logic board.
Use the flat end of a spudger to lift the subwoofer & right speaker connector out of its socket on the logic board.
Pry up from beneath the wires.

Use the tip of a spudger or your fingernail to flip up the retaining flap on the IR sensor ribbon cable socket.
Be sure you are prying up on the retaining flap, not the socket itself.
Pull the IR sensor ribbon cable out of its socket.

Remove the following four screws:
Two 3.5 mm Phillips screws
Two 1.6 mm Phillips screws
Remove both connector shields from the logic board.

Use the flat end of a spudger to pry
the trackpad connector up and out of its socket on the logic board.

Use your fingernail to flip up the retaining flap on the keyboard ribbon cable socket.
Be sure you are prying up on the retaining flap, not the socket itself.
Pull the keyboard ribbon cable out of its socket.
For reassembly, it can be helpful to put a small piece of tape on the keyboard ribbon cable (being careful not to stick any to the contacts), to create a small handle. Align the cable with the socket and gently pull with the tape to fully seat it.

Use your fingernail to flip up the retaining flap on the express card cage ribbon cable socket.
Be sure you are prying up on the retaining flap, not the socket itself.
Pull the express card cage ribbon cable out of its socket.

Use the flat end of a spudger to lift the hard drive cable connector up and out of its socket on the logic board.

Use the tip of a spudger or your fingernail to flip up the retaining flap on the battery indicator cable socket.
Be sure you are prying up on the retaining flap, not the socket itself.
Pull the battery indicator ribbon cable out of its socket.

Lift the black plastic flap attached to the display data cable retainer and rotate it toward the DC-In side of the MacBook.
Pull the display data cable out of its socket.
The display data cable socket is very fragile. Do not lift the connector upward as you disconnect it, as the socket may break off the logic board. Pull the cable parallel to the face of the logic board.

Remove the following eight screws securing the logic board and DC-In board to the upper case:
Six 3.2 mm Phillips screws
Two 7.6 mm Phillips screws

Handle the logic board assembly by its edges only.
Lift the logic board assembly from the side nearest the optical drive and lift it away from the upper case.
Note that you'll be removing the logic board and DC-in board together.
Carefully pull the ports and DC-In board away from the side of the upper case and remove
the logic board assembly, minding any cables that may get caught.

Pull the DC-In board connector away from its socket on the logic board.
Pull the cable parallel to the face of the logic board toward the heat sink.

Nintendo Wii – How to replace the fan of Nintendo Wii

Nintendo Wii:  FAN REPLACEMENT PROCEDURE 

Use a metal spudger to remove the white plastic screw covers stuck to the lower case near the front of the Wii.

Remove the two 8.3 mm Tri-Wing screws hidden under the covers you just removed.

Remove the single 5.9 mm Phillips screw under the controller port door nearest the faceplate.

Use a metal spudger to remove the rubber foot stuck to the side of the Wii near the DVD drive opening.

Remove the single 5.9 mm Phillips screw hidden under the foot you just removed.

Carefully pull the faceplate away from the front of the Wii. Use a pair of tweezers to disconnect the LED cable's plastic connector from the motherboard. Remove the faceplate.

Open the controller port cover until it is perpendicular to the black controller port bezel. Pull the controller port cover straight up to release it from the outer case.

Repeat this procedure for the memory card port cover.

Remove the two remaining 4.1 mm Phillips screws along the top edge of the black plastic controller port bezel. Lift the bezel from the long edge furthest away from the controller ports and remove it from the Wii.

Remove the two 5 mm Phillips screws above the controller ports. Use a metal spudger to remove the three highlighted screw covers stuck to the side of the Wii.

Remove the following screws:

Two 5 mm Phillips screws
One 8.2 mm Tri-Wing screw Use a metal spudger to remove the two rubber feet stuck to the bottom face of the Wii near the rear ports.

Remove the two 8.2 mm Tri-Wing screws hidden under the feet you just removed. Lift the outer case straight up off the body of the Wii.

Grab the fan connector with a pair of tweezers and lift it straight up and out of its socket on the motherboard. Be sure your tweezers are clamped down on the fan connector, not the socket attached to the motherboard. Remove the two 10 mm Phillips screws securing the fan to the fan shroud.

Remove the fan from the Wii.

Lenovo ThinkPad Tablet – How to check the internal battery pack status – how to check the Ac Adapter

Lenovo ThinkPad Tablet:  Checking the internal battery
When you use the internal battery but the tablet fails, see the instructions in this topic to check the internal battery.
To check the internal battery, do the following:
1. Turn off the tablet.
2. Replace the internal battery with another battery.
3. Check that power is supplied when you turn on the tablet.
If you can turn on the tablet, replace the internal battery.

Checking the internal battery condition
After you have used the tablet for a long time, check the internal battery condition and determine if the
battery shall be replaced with a new one.
To check the internal battery condition, do the following:
1. Open the Android Settings screen.
To open the Android Settings screen, do either of the following:
From the main Home screen, touch the Android Settings icon on Lenovo Launch Zone. The Android Settings screen is displayed.

Touch the application icon from the action bar and then touch Settings. The Android Settings screen is displayed.
2. Touch About tablet.
3. Touch Status > Battery Condition. One of the following conditions might be displayed:
Good
Fair
Poor
If the condition is Fair or Poor, replace the internal battery.
Checking the ThinkPad Tablet AC Charger
When you use the ThinkPad Tablet AC Charger to charge the tablet but no power is charged, see the instructions in this topic to check the ThinkPad Tablet AC Charger.
To check the ThinkPad Tablet AC Charger, do the following:
1. Disconnect the micro-USB cable from the tablet.
2. Measure the output voltage across the connector marked B of the micro-USB cable. Refer to the following figure:

Note: The output voltage across pin 3 of the micro-B connector might be different from the one you are

servicing.
3. If the voltage is not correct, replace the micro-USB cable.
4. If the voltage is acceptable, replace the system board.
Checking the internal battery status
To check the battery status of the tablet, do either of the following:
Approximate information about the battery status
Get the approximate status of the battery at any time by checking the battery status icon on the system bar in the lower-right corner of the screen. The shorter the blue bar is, the less the battery power remains.
Accurate information about the battery status
To get the accurate information about the battery status of the tablet, do the following:
1. Open the Android Settings screen.
To open the Android Settings screen, do either of the following:
From the main Home screen, touch the Android Settings icon on Lenovo Launch Zone. The Android Settings screen is displayed.
Touch the application icon from the action bar and then touch Settings. The Android Settings screen is displayed.
2. Touch About tablet on the Android Settings screen.
3. Touch Status to view the accurate percentage of the remaining battery power. You also can touch
Battery use to check what applications are consuming battery power.

Changing the password, PIN, or pattern
To change a password, PIN, or pattern, do the following:
1. Open the Android Settings screen.
To open the Android Settings screen, do either of the following:
From the main Home screen, touch the Android Settings icon on Lenovo Launch Zone. The Android Settings screen is displayed.
Touch the application icon from the action bar and then touch Settings. The Android Settings screen is displayed.
2. Touch Location & Security > Configure lock screen.
3. Touch the screen unlock mode you have set and type the password or PIN, or draw the pattern. Then touch OK.

4. Type your new password or PIN, or draw a new pattern. Confirm it by typing or drawing it for a second time.
5. Touch OK to save your change.

Panasonic TH-L42E6T – How to enter to service mode – How to cancel Hotel mode – Standby led blinking and cause

Panasonic TH-L42E6T:  How to enter into Service Mode

Purpose
After exchange parts, check and adjust the contents of adjustment mode.
While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.

Key command
[1] button...Main items Selection in forward direction
[2] button...Main items Selection in reverse direction
[3] button...Sub items Selection in forward direction
[4] button...Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )
How to exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

Display of SOS History
SOS History (Number of LED blinking ) indication.
From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.
This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory shipment setting].
POWER ON TIME/COUNT
Note : To display TIME/COUNT menu, highlight position, then press MUTE for 3sec.
Time : Cumulative power on time, indicated hour : minute by decimal
Count : Number of ON times by decimal
Note : This indication will not be cleared by either of the self-checks or any other command.
Exit
1. Disconnect the AC cord from wall outlet.
Technical Descriptions
Specification of KEY for DTCP-IP, WMDRM and Widevine
General information:
1. NAND Flash (IC8900) for spare parts has the seed of KEY for each DTCP-IP for DLNA, WMDRM for Netflix and Widevine for CinemaNow.
2. The final KEY data will be generated by Main IC (IC8000) when SELF CHECK was done and are stored in both Main IC (IC8000) and NAND Flash (IC8900).
Replacement of ICs:
When Main IC is replaced, NAND Flash should be also replaced with new one the same time.
When NAND Flash is replaced, Main IC is not necessary to be replaced the same time. After the replacement of IC, SELF CHECK should be done to generate the final KEY data. How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
TV will be forced to the factory shipment setting after this SELF CHECK.

Hotel Mode
1. Purpose
Restrict a function for hotels.
2. Access command to the Hotel mode setup menu. In order to display the Hotel mode setup menu: While pressing [VOLUME (-)] button of the main unit, press [AV] button of the remote control three times within 2 seconds.

Check of the IIC bus lines
How to access
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
Exit
Disconnect the AC cord from wall outlet.

Power LED Blinking
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an abnormality occurs, the protection circuit will operate and reset the unit to stand by mode. During this time, the defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit as follow:

Blinking Times	Contents	Check point
1	BACK LIGHT SOS	LCD PANEL P-Board
7	SUB 3.3V SENSE SOS	A-Board
9	SOUND SOS	A-Board Speaker
13	EMERGENCY	A-Board

LG Ally VS740 – Disassembling procedure – Cameras flash replacement

LG Ally VS740:  DISASSEMBLING PROCEDURE 

Hold phone in hand, then flip to battery pack Take off battery cover

Remove battery Locate the six surrounding screws located on the edge of the inner compartment, including the two screws on the metal piece where the battery was once placed.

Slide the phone open. Notice on the edges around the keyboard, there is a thick casing. Remove this casing, instructions below… Placing two dominant fingers on the back plate where the battery was, use your thumb finger nail (or prying utensil) and place it on the edge of this thin casing. Firmly, push down with your finger nail (prying utensil) around the casing from left to right. Disconnect casing from keyboard section. Flip the phone over and remove it.

Using your prying tool, lift the green circuit board platform off the black casing and gently disconnect the connection point between the tether and the green circuit board. Flip phone over, and notice where the camera lies on the other side, there are three small clips connecting a black casing over the section of the phone. Gently using your hands or the prying tool, take these clips off.

The white rectangle with the yellow square is the flash. Gently lift up and disconnect flash module. Take your new flash and aligning the connection point to the connection hole, push it down firmly until it is snug in place. Follow the steps backwards to put phone back together.

Motorola Droid Pro – Disassembling procedure – How to replace the careen – How to replace the Keyboard

Motorola Droid Pro:  DISASSEMBLING PROCEDURE 

Remove the back cover and battery by using the thumb tabs.

Unscrew the 8 back panel screws using the T4 Torx screwdriver.

Use a spudger to open the phone along the sides between the back panel and the chrome trim.

It is held together by small clips that lock in. You may have to use a little force to unlock them.
Go around on all sides then pull the back panel off.

Gently lift the SD & SIM card board (PCB) as shown in the following pictures. This will expose the ribbon cable attached to the board and another ribbon cable for the mother board. Remove them both using the spudger. Once the small one is removed the small board can be pulled off.

Unscrew the 6 screws using the T5 Torx screwdriver.

Unlock the ribbon cable and then you can pull the screen out. When replacing screen make sure you lock the ribbon cable back in place.

Pop out key board using a spudger on the marked points. The keyboard is locked in place, but can pop in and out. You may need to use a little force to get it out. Once out you can pop the new keyboard in the opposite way you took it out.

Acer Aspire V5-571- How to replace the Hard disc drive

Acer Aspire V5-571:  HOW TO REPLACE THE HARD DISC DRIVE 

Turn off the laptop and remove the battery.
Remove two screws securing the Keyboard.
The Keyboard is held by two locking clips, under the battery. Use the sharp tip of a plastic tool to release the keyboard.

Remove the Keyboard and disconnect the two flex cables:

Keyboard flex cable
Keyboard Light flex cable

Remove 4x phillips screws and disconnect:

Power On button flex cable
Touch pad flex cable
Remove 18x Phillips screws from the bottom cover.
Remove any memory SD Card from the Card reader.
Start opening with a plastic opening tool.

Carefully separate the upper cover and remove it.

Gently remove the HDD and disconnect the SATA cable from it.

TROUBLESHOOTING 

HDD Not Operating Correctly 

If the HDD fails to operate correctly, perform the following:
1. Disconnect all external devices.
2. Run a complete virus scan using up-to-date software to confirm the computer is virus free.
3. Run the Windows Vista Startup Repair Utility:
a. Insert the Windows Vista Operating System DVD in the ODD and restart the computer.
b. When prompted, press any key to start to the operating system DVD.
c. When the Install Windows screen appears, click Next.
d. Select Repair your computer.
e. When the System Recovery Options screen appears, click Next.
f. Select the appropriate operating system, and click Next.
NOTE: Click Load Drivers if controller drives are required.
g. Select Startup Repair.
NOTE: Startup Repair attempts to locate and resolve issues with the computer.
h. When complete, click Finish.
If an issue is discovered, follow the on-screen information to resolve the problem.
1. Run the Windows Memory Diagnostic Tool. For more information see Windows Help and Support.
2. Restart the computer and press F2 to enter the BIOS Utility. Check the BIOS settings are correct and that CD/DVD drive is set as the first boot device on the Boot menu.
3. Confirm all cables and jumpers on the HDD and ODD are set correctly.
4. Remove any recently added hardware and associated software.
5. Run the Windows Disk Defragmenter. For more information see Windows Help and Support.
6. Run Windows Check Disk by entering chkdsk /r from a command prompt. For more information see Windows Help and Support.
7. Restore system and file settings from a known good date using System Restore.
8. If the issue is not fixed, repeat the preceding steps and select an earlier time and date.
9. Replace the HDD.

Computer Shuts Down Intermittently
If the system powers off at intervals, perform the following.
1. Makes sure the power cable is properly connected to the computer and the electrical outlet.
2. Remove all extension cables between the computer and the outlet.
3. Remove all surge protectors between the computer and the electrical outlet. Plug the computer directly into a known serviceable electrical outlet.
4. Disconnect the power and open the casing to check the Thermal Unit and fan airways are free of obstructions.
5. Remove all external and non-essential hardware connected to the computer that are not necessary to boot the computer to the failure point.
6. Remove any recently installed software.

Apple MacBook Air 11 – How to replace the logic board

Apple MacBook Air 11:  LOGIC BOARD REPLACING PROCEDURE 

Shut down and close your computer. Lay it on a soft surface top-side down. Remove the following ten screws: Two 8 mm 5-point Pentalobe screws
Eight 2.5 mm 5-point Pentalobe screws
The special screwdriver needed to remove the 5-point Pentalobe screws.

Wedge your fingers between the display and the lower case and pull upward to pop the lower case off the Air.

In this step you will disconnect the battery to help avoid shorting out any components during service.

Use the flat end of a spudger to pry both short sides of the battery connector upward to disconnect it from its socket on the logic board.
Bend the battery cable slightly away from the logic board so the connector will not accidentally contact its socket.

Remove the single 2.9 mm T5 Torx screw securing the SSD to the logic board.

Use a spudger to help lift the free end of the SSD just enough to grab it with your other hand.

Do not lift the end of the SSD excessively. Pull the drive straight out of its socket and remove it from the logic board. When reinstalling the SSD, be sure it is properly seated before reinstalling its retaining screw.

Use the flat end of a spudger to pry the I/O board cable up from its socket on the I/O board.

Peel the I/O board cable up from the adhesive securing it to the fan.

Use the flat end of a spudger to lift the I/O board connector up and out of its socket on the logic board Be sure to lift straight up on the connector as you disconnect it from its socket. The socket is very deep on the logic board and prying it from side to side may damage the logic board Remove the I/O board cable.

Use the tip of a spudger to carefully flip up the retaining flap on the fan cable ZIF socket. Be sure you are prying up on the hinged retaining flap, not the socket itself. Remove the following three screws securing the fan to the upper case:

Two 5.2 mm T5 Torx screws
One 3.6 mm T5 Torx screw

Lift the fan out of the upper case and carefully pull the fan ribbon cable out of its socket as you remove it from the Air. Remove the following five screws securing the battery to the upper case:

Two 5.2 mm T5 Torx screws
One 6 mm T5 Torx screw
Two 2.6 mm T5 Torx screws

Do not touch or squeeze the six lithium polymer cells when handling the battery. Lift the battery from its edge nearest the logic board and remove it from the upper case.

Use the flat end of a spudger to free the adhesive loop securing the I/O board power cable to the upper case. Disconnect the I/O board by pulling the power cable away from its socket on the logic board. Pull the cable parallel to the face of the logic board toward the front edge of the Air.

Use the tip of a spudger to flip up the retaining flap on the keyboard backlight ribbon cable ZIF socket. Be sure you are prying up on the hinged retaining flap, not the socket itself. Pull the keyboard backlight ribbon cable out of its socket.

Use the tip of a spudger or your fingernail to flip up the retaining flap on the trackpad ribbon cable ZIF socket. Be sure you are prying up on the hinged retaining flap, not the socket itself. Pull the trackpad ribbon cable straight out of its socket toward the front edge of the Air.

Use the tip of a spudger to de-route the right speaker cable from the slot cut into the logic board.

Use the flat end of a spudger to pry the right speaker cable connector up and out of its socket on the logic board. Pry up from beneath the cables.

Gently push the tip of a spudger under the black plastic flap stuck to the display data cable lock to make the lock pop upward and away from the socket. Remove the small rubber gasket from the corner of the upper case near the display data cable.

While holding the lock away from the socket, gently pull the display data cable out of its socket. Do not pull upward on the display data cable as you disconnect it, as its socket may break off the logic board.

Use the flat end of a spudger to pry both antenna cable connectors up and off their sockets on the AirPort/Bluetooth card.

Gently de-route the antenna cables from the slot cut into the logic board. Remove the three 3.6 mm T5 Torx screws securing the logic board to the upper case.

Gently lift the logic board assembly out of the upper case, minding the fragile heat sink and any cables that may get caught. Remove the single 2.9 mm T5 Torx screw securing the AirPort/Bluetooth card to the logic board.

Slightly lift the free end of the AirPort/Bluetooth board and pull it out of its socket on the logic board. To avoid damaging its socket on the logic board, do not excessively lift the free end of the AirPort/Bluetooth card. Remove the AirPort/Bluetooth board from the logic board. Remove the four 2.5 mm T5 Torx screws securing the heat sink to the logic board.

If the heat sink seems to be stuck to the logic board after removing all four screws, use a spudger to carefully separate the heat sink from the faces of the CPU and GPU. Remove the heat sink from the logic board. Logic board remains.

Apple iPhone 4 – How to replace the speaker of Apple iPhone – How to remove the case – How to remove the Battery Apple iPhone 4

SPEAKER REPLACING PROCEDURE 

Before disassembling your iPhone, be sure it is powered off. Your iPhone 4 rear cover may have either two #000 Phillips screws or Apple's 5-Point "Pentalobe" screws. Check which screws you have, and ensure you also have the correct screwdriver in order to remove them. Remove the two 3.6 mm Pentalobe or Phillips #000 screws next to the dock connector. During reassembly, we recommend you replace the 5-point screws with equivalent Phillips screws.. The 5-Point Screwdriver should only be used once, as it has the potential to strip the screws.

Push the rear panel toward the top edge of the iPhone. The panel will move about 2 mm.

Pinch the rear panel with your fingers and lift it away from the iPhone. Alternatively, use a Small Suction Cup . Be careful not to damage the plastic clips attached to the rear panel.

If you are installing a new rear panel, be sure to remove the plastic protective sticker from the inside of the camera lens and the sticker from the large black area near the lens.

Remove the single 2.5 mm Phillips screw securing the battery connector to the logic board. Some devices may have two screws, one of which holds down the contact pad which is located above the screw indicated in red in the photo.

Use a plastic opening tool to gently pry the battery connector up from its socket on the logic board. Pry from the top and bottom of the connector bracket there isn't as much of an overhang on the sides, and you may damage the connector.
Be very careful to only pry up on the battery connector and not the socket on the logic board. If you pry up on the logic board socket, you may break it entirely.
Remove the metal clip covering the antenna connector.

Use the clear plastic pull tab to gently lift the battery out of the iPhone.

Do not remove the plastic tab from the iPhone.
You may need to use a plastic opening tool to loosen the adhesive under the battery.
Remove the contact clip from the iPhone. Before reconnecting the battery connector, be sure the contact clip (shown in red) is properly positioned next to the battery connector.
Before reassembly, be sure to clean all metal-to-metal contact points on the pressure contact as well as its contact point on the rear panel with a de-greaser such as windex. The oils on your fingers have the potential to cause wireless interference issues.

Use a SIM card eject tool or a paperclip to eject the SIM card and its holder. This may require a significant amount of force. Remove the SIM card and its holder.

Remove the following two screws:

One 1.2 mm Phillips
One 1.6 mm Phillips Remove the thin steel dock connector cable cover from the iPhone. Before reassembly, be sure to clean all metal-to-metal contact points on the dock connector cable cover with a de-greaser such as windex. The oils on your fingers have the potential to cause wireless interference issues.

Use an iPod opening tool to gently pry the dock cable connector up off the logic board from both short ends of the connector.

Carefully peel the dock ribbon cable off the logic board and the lower speaker enclosure. Do not use excessive force to peel the dock ribbon cable off the logic board. Doing so may tear the cable.

Use a plastic opening tool to pry the lower antenna connector up off its socket on the logic board. Remove the 1.9 mm Phillips screw securing the bottom of the logic board to the inner case.

Remove the following five screws securing the Wi-Fi antenna to the logic board:

One 2.3 mm Phillips
Two 1.6 mm Phillips
One 1.4 mm Phillips
One 4.8 mm Phillips When re-assembling, start off with replacing the 4.8 mm Philips screw first, then the 2.3 mm. This is to ensure there is no mix-up, and avoid rendering the LCD and digitizer useless.
Also make sure to put the long 4.8 mm Philips back in correctly when reassembling. This is the ground for the Wi-Fi antenna and is often the culprit if you are having bad Wi-Fi reception after reassembly.

Use an iPod opening tool to slightly lift the top edge of the Wi-Fi antenna away from the logic board.

Use the tip of a spudger to pull the Wi-Fi retaining clips away from the inner frame. Remove the Wi-Fi antenna from the iPhone. Make sure you don't lose the metal clips on the top of the cover where the 4.8mm screw attaches or the 4.8mm screw. That's the primary reason for abnormal Wi-Fi performance after the reassembly.
Before reassembly, be sure to clean all metal-to-metal contact points on the connector cover with a de-greaser such as Windex. The oils on your fingers have the potential to cause wireless interference issues. Do not clean the connectors themselves with Windex.

Use an iPod opening tool to carefully lift the rear camera connector up off its socket on the logic board. Remove the rear camera.

Remove the small circular white sticker (warranty sticker and water indicator) covering the screw near the battery pull tab. Remove the 2.4 mm Phillips screw that was hidden underneath the sticker.

Use the edge of a plastic opening tool to gently pry the following connectors up and out of their sockets on the logic board:

Digitizer cable (pry from bottom)
LCD cable (pry from bottom) Headphone jack/volume button cable (pry from top)
Top Microphone/sleep button cable (pry from top)
Front camera cable (pry from top)

Use a small flathead screwdriver to remove the 4.8 mm standoff near the headphone jack. When reassembling the device, this standoff sets the height of the Wi-Fi shield removed . If not torqued down, the shield will be above the plane of the frame and the back will not slide into place. The shield should be flush with the headphone jack.
When reassembling the motherboard, ensure that its edge sits under the circled standoff, otherwise the screws will not fit. When reassembling ensure that the small rubber spacer attached to the top of the motherboard is in place. Without this part the motherboard could damage the ribbon cables around it.

Carefully remove the logic board from the iPhone, minding any cables that may get caught. Be careful not to damage the small gold prong (marked in red, near the top) as it's very fragile.

On reassembly, be careful not to trap the lower antenna cable beneath the logic board.
Remove the single 2.4 mm Phillips screw securing the speaker enclosure to the side of the inner frame.

Remove the speaker enclosure from the iPhone. Before re-fastening the speaker enclosure to the inner frame, be sure the four small EMI fingers rest below the lip of the LCD frame.

Before reassembly, be sure to clean all metal-to-metal contact points between the EMI fingers and the internal frame as well as the brass screw mounting point with a de-greaser such as Windex. The oils on your fingers have the potential to cause wireless interference issues.

Lenovo IdeaPad N585 - N586 – How to check the battery pack - How to test the battery Charger – How to remove the Keyboard – How to replace the battery – Laptop repair and service

 Lenovo IdeaPad  N585 - N586: Checking the AC adapter

 If the power-on indicator does not turn on, check the power cord of the AC adapter for correct continuity and installation.
To check the AC adapter, follow the steps below:
1. Unplug the AC adapter cable from the computer.
2. Measure the output voltage at the plug of the AC adapter cable. See the following figure:

Note: Output voltage for the AC adapter pin No. 2 may differ from the one you are servicing.

3. If the voltage is not correct, replace the AC adapter.
4. If the voltage is acceptable, do the following:
Replace the system board.
Note: Noise from the AC adapter does not always indicate a defect.

Checking operational charging
To check whether the battery charges properly during operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer.
Perform operational charging. If the battery status indicator or icon does not light on, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icon is still off, replace the battery pack.
If the charge indicator still does not light on, replace the system board. Then reinstall the battery pack. If it is still not charged, go to the next section.
Checking the battery pack
Battery charging does not start until the Power Meter shows that less than 95% of the total power remains; under this condition the battery pack can charge to 100% of its capacity. This protects the battery pack from being overcharged or from having a shortened life.
To check your battery, move your cursor to the Power Meter icon in the icon tray of the Windows taskbar and wait for a moment (but do not click it), and the percentage of battery power remaining is displayed. To get detailed information about the battery, double-click the Power Meter icon.
Note: If the battery pack becomes hot, it may not be able to be charged. Remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall and recharge it.
To check the battery pack, follow the steps below:
1. Turn off the computer.
2. Remove the battery pack and measure the voltage between battery terminals  (+) and  (-). See the following figure:

3. If battery output voltage is less than +3.9V DC, the battery is damaged, replace it. If battery output voltage is less than +9V DC, perhaps the battery has entered into over discharge protection mode, pre-charge the battery with AC, please replace the battery if battery capacity can not be charged over 0% within 2 hours.

4. If the battery output voltage is more than +9V DC, measure the resistance between battery terminals 5 and 7. The resistance should be 4 to 30 KΩ. If the resistance is not correct, replace the battery pack. If the resistance is correct, check the system board function.

DISASSEMBLING PROCEDURE 

Battery pack

Unlock the manual battery latch. Holding the spring-loaded battery latch in the unlocked position  , remove the battery pack

Keyboard

Remove the three screws.

Loosen the keyboard with fingers 

Lift the keyboard a little, and then detach the connector