Lenovo G400s - G405s - G400s Touch - G500s - G505s - G500s – How to Check the battery pack – How to check the Ac adapter – How to remove the battery

Lenovo G400s - G405s - G400s Touch - G500s - G505s - G500s:  To verify a symptom, follow the steps below:

1. Turn off the computer.

2. Remove the battery pack.

3. Connect the AC adapter.

4. Make sure that power is supplied when you turn on the computer.

5. Turn off the computer.

6. Disconnect the AC adapter and install the charged battery pack.

7. Make sure that the battery pack supplies power when you turn on the computer.

If you suspect a power problem, see the appropriate one of the following power

supply checkouts:

“Checking the AC adapter”

“Checking operational charging”

“Checking the battery pack”

Checking the AC adapter

You are here because the computer fails only when the AC adapter is used.

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

1 (+) and 7 (-). See the following figure:

3. If the voltage is less than +11.0 V DC, the battery pack has been discharged.

Note: Recharging will be continued for at least 3 hours, even though the indicator does not light on.

If the voltage is still less than +11.0 V DC after recharging, replace the battery.

4. If the voltage is more than +11.0 V DC, measure the resistance between battery terminals 5 and 7. The resistance must be 4 to 30 KΩ. If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the system board.

Battery pack

Unlock the manual latch 1. Slide the spring-loaded latch to the unlocked position 2 to eject the battery pack. Lift up the inner edge3 of the battery pack, pivoting it on the outer edge. Slide the battery pack in the indicated direction 4 to remove it.

Kindle Paperwhite – Disassembling procedure – How to remove the case – How to remove the battery – How to replace the display

Gently pry the bezel off the screen using a spudger. It is easier to start in the corners and work your way around the bezel.

Do not insert the spudger too far under the bezel; it could easily damage the screen.

 Remove the eleven 3.0 mm Phillips screws surrounding the midframe.

 At the top of the display, a strip of black tape covers one screw.

 Lift the midframe out of the case. If the midframe is stuck, slide it to the left first, and then lift ii out.

 Turn over the midframe to locate the battery.

 Remove the three Phillips 3.0 mm screws securing the battery to the midframe.

Gently lift the battery from the bottom, and slide it out of the midframe.

Use a spudger to lift up the retaining flap on the large ZIF connector at the bottom left of the motherboard.

Gently pull the large ribbon cable out of the ZIF connector.

Flip up the retaining flap on the small ZIF connector at the bottom of the motherboard.

Pull the small ribbon cable out of the ZIF connector.

Lift up the flat, yellow connector from its socket on the bottom right of the motherboard.

Remove the yellow anti-static tape from the display cable.

Use a spudger to flip up the retaining flap on the display cable ZIF connector. Carefully pull the display cable out of its socket.

Lift the motherboard out of the midframe.

The screen itself is glued to the midframe. If your replacement screen does not include the midframe, heat the screen with an iOpener and gently pry it from the midframe with a spudger or plastic card

Apple MacBook Pro 17 – How to replace the Optical drive of Apple MacBook Pro 17 – How to replace the Optical drive cable

Apple MacBook Pro 17:  DISASSEMBLING PROCEDURE 

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.

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. For Late 2011 models, the camera connector plugs straight down into the motherboard—to remove this connector, gently lift it straight up.

Carefully pull the Bluetooth cable toward the fans to disconnect it from the Bluetooth board. Pull the cable parallel to the face of the optical drive.

Use the flat end of a spudger to peel the thin plastic cover off the top and sides of the Bluetooth board housing.

Use the flat end of a spudger to pry the Bluetooth antenna connector up and off its socket on the Bluetooth board.

If present, remove the small piece of EMI foam near the Bluetooth board. De-route the camera cable from the slot molded into the Bluetooth board housing.

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

Remove the three 3.5 mm Phillips screws securing the optical drive to the upper case. To remove the screw closest to the battery, it may be helpful to use a T6 Torx screwdriver to first remove the upper case bracket directly above it.

Remove the optical drive from the upper case, minding any cables that may get caught.

Grab the optical drive cable by its connector and pull it away from the body of the optical drive. Pulling on anything other than the optical drive connector may damage the optical 

drive cable.

Nintendo Wii – How to disassemble Nintendo Wii – How to remove the case – Laptop repair and service

Nintendo Wii

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.

Nexus 4 – Disassembling procedure – How to remove the rear panel – How to remove the battery – How to replace the speaker – how to replace the Power button

Nexus 4  Mobile:  DISASSEMBLING PROCEDURE 

Remove the SIM tray using the SIM Card Eject Tool.
This step is required in order to remove the back case.

Remove the two screws from the bottom of the phone with a T5 Torx Screwdriver.

Gently open the back case by prying along the edge of the cover, starting at a corner of the phone and circling around the phone using a plastic opening tool.

The opening process may take a few minutes. The plastic will make a light snapping noise as the back cover separates from the rest of the phone.

Remove the two 1.8 mm Phillips #00 screws holding down the battery connector. Using a plastic opening tool, disconnect the battery cable from its socket on the motherboard.

Remove the blue tape that secures the white antenna cable to the battery.

Using a spudger, carefully disconnect the white antenna cable. Carefully pry the battery out with a Plastic Opening Tool, starting at the top left-hand corner and working down towards the bottom right-hand corner.
If necessary, you can also use a plastic card to separate the battery from the metal midframe.
The battery is securely glued to the phone. When reinstalling the battery, press the battery firmly against the adhesive strip.

Remove the two 4.8 mm screws that hold the speaker enclosure together using the Phillips 00 screwdriver.

 Gently pry the speaker up and away from the back of the phone using a plastic opening tool, and lift it out of the phone.

Power and Volume Button

Holding the back case, gently push the power button in towards the center of the phone using a spudger.

 To remove the volume button, push the button in towards the center of the phone using a spudger.

PlayStation Vita – Disassembling procedure – How to remove the case – How to remove the battery

PlayStation Vita

Power off and remove the memory card. Using a Phillips #00 screwdriver, remove the four 6.4mm screws on the back casing.

Using your fingernail or a spudger, pry open the accessory port cover on the top of the device. Using a Phillips #00 screwdriver, remove the two 5.4mm screws hidden beneath the accessory port cover.

Remove the two 5.4mm Phillips #00 screws on the bottom of the device near the charging port.

Beginning at the sides of the device, use a plastic opening tool to separate the front and rear cases. Continue working your way around the device gently prying it open. There are still wires holding the front and rear cases together. You may damage the connections if you yank the cases completely apart.

Gently separate the two cases, minding the battery and the touch screen controller connectors holding the two cases together.

Using a spudger, free the touch screen controller flex cable by gently prying up the connection.

Free the battery cable by gently prying up on the connection with a spudger. Separate the front and rear cases.

With the help of a spudger, gently pry off and remove the battery cable retainer on the back casing assembly.

The easiest access to the battery cable retainer is where the battery cable comes out.

Using your finger or a spudger, lift the battery out and remove it. Guide the battery wires through the hole in the back casing as you remove the battery.

HTC Droid DNA – Disassembling procedure – How to remove the case – How to remove the connections – How to replace the battery HTC Droid DNA

Poke a paperclip into the hole to the right of the SIM Card Tray. The SIM Card Tray will automatically pop out.

Pull out the SIM Card Tray with your fingers.

Make sure the USB cover on the bottom of the phone is removed first. Starting at a corner, slowly work your way around the edge of the sides with your prying tool to loosen the front panel.

Take your time. A lot of force is necessary to loosen the front panel.

Slowly pull the panel apart from the back of the phone. Apply a moderate force to pry the panel from the back of the phone.

Set the device down so that the bottom of the phone is facing to the right. Gently take off the piece of black tape surrounding the motherboard. Be careful not to rip the tape.

Use your tweezers to take off the yellow tape on the bottom left corner of the phone.

Rotate your phone 90 degrees clockwise so the bottom of the phone is facing you.
Use the T5 Torx screwdriver to remove the two 4mm screws located at the bottom of the phone.

Use the Phillips #000 screwdriver to remove the single 2.7mm void screw on the bottom right.

Rotate your phone back 90 Degrees counter-clockwise. Use your tweezers to take off the small metal retaining bracket on the bottom right of the phone.

Remove the following Phillips #000 screws from the motherboard:

Four 1.6 mm screws
Two 1.5 mm screws

Use your pry tool to unfasten the connectors on both sides of the motherboard. The connectors will still be attached to the green camera board at the top so DO NOT try to pull them off or bend them severely.

Use your tweezers to remove the two pieces of yellow tape shown.

Use your tweezers to gently snap up the white board on the bottom right of the motherboard.

Use your tweezers to disconnect the black connector on the bottom right of the motherboard. Be careful not to bend the Flex Cable of the Connector

Use your tweezers to gently snap the other white board on the bottom right of the motherboard up.

Use your tweezers to disconnect the other small connector on the bottom right of the motherboard. Be careful not to bend the Flex Cables for the Connector.

Rotate the phone 180 degrees. Use your tweezers to gently snap up the white board on the top left of the motherboard.

Use your tweezers to disconnect the cable on the top left of the motherboard. Be careful not to bend the Flex Cable of the Connector.

Use your tweezers to gently snap up the black board on the top left of the motherboard.

Use your tweezers to gently remove the yellow connector on the top left of the phone.

Remove the long black wire on the left of the motherboard.

Reorient the phone so that the green camera board is farthest from you. Use your tweezers to remove the two wires located at the top of the board. The wires snap off very easily so not much force is needed.

Use a Phillips #000 screwdriver to remove the two 3.9mm screws on top of motherboard.

Now, use your fingers to slowly pull up the motherboard and remove it from the phone.

Use the plastic prying tool to gently remove the charging port assembly.

Use a Phillips #000 screw driver to remove the single 2.1mm screw located on the backside of the assembly.

Use your tweezers to undo the red and black wire connection.

Use the plastic prying tool to separate the assembly into two pieces: blue and black.

Apply pressure to the grey side of the speaker with a blunt object to push out the speaker.

The speaker is stuck with adhesive so it will take a little bit of extra force.

Blackberry Curve 8330 – Disassembling procedure – How to replace the mother board

Blackberry Curve 8330:  Disassembling procedure 

We did not have an actual back cover or battery for the phone we were given. Therefore, the first couple of steps will be without pictures. Hold the phone with the back side facing you. Press down on the silver tab towards the bottom end of the phone. Carefully lift up the back casing to reveal the battery.

Put your finger on the top left corner of the battery and lift the battery up and out of its housing. The phone should now look like this.

Remove the two top screws using a T5 Torx screwdriver.

Use a plastic opening tool to pry the edges of the bottom cover until it snaps loose. The cover will now pull off easily.

Use a plastic opening tool to pry between the front and back cover. Start prying from wherever it is easiest to separate the silver and black plastic of the covers.

There are 5 securing clips on the front panel to disconnect.
Pry gently to prevent breaking the plastic clips when removing the front panel.
Once all the clips have been freed, the front cover will lift away from the phone.

Lift the flexible keypad away from the device. It should come off easily.

Use a T6 Torx Screwdriver to remove the four corner screws on the keyboard's housing. Lift the keyboard frame away from the device. There may be a small amount of adhesive at the bottom of the frame that needs to be pulled away.

Detach each side casing by pulling them off gently from the phone.

Remove the back housing from the mother board. Unhook the screen frame from the small tab at the top of the motherboard.

Using a plastic opening tool, detach the connector on the LCD screen from the motherboard. There may be some adhesive behind the LCD screen. If needed, pry the LCD screen away from the motherboard using the plastic opening tool. Remove the LCD screen from the motherboard

Once the LCD screen is taken off, the motherboard is fully separated from the device. The picture shown is the back side of the motherboard.

Apple iMac 27 – How to replace the power supply of Apple iMac

Stick a heavy-duty suction cup near each of the two top corners of the glass panel. To attach the suction cups, first position the suction cup with the movable handle parallel to the face of the glass panel (as highlighted in the second picture).
While lightly holding the suction cup against the glass, raise the movable handle until it is parallel with the other handle (as highlighted by the third picture).
If your suction cups refuse to stick, try cleaning both the glass panel and the suction cup with a damp soft, lint-free cloth. (Dampen with distilled water, and if needed, an equal ratio of distilled water and white vinegar for best results.)

Do not use the suction cups to carry the display glass because if one of them fails to stick, you could drop the screen and break it.
The original iMac box makes a good place to store the glass panel. Otherwise, a padded horizontal surface, like a towel on a desk will do nicely.

Gently lift the glass panel perpendicular to the face of the LCD enough to clear the steel mounting pins attached along the underside of the top edge of the glass panel.

Pull the glass panel away from the lower edge of the iMac and carefully set it aside. Don't use the suction cups to carry the glass panel if either one loses its grip, the panel could fall and break.
After setting the glass panel down safely, be sure to release the suction cups, as the suction force over time, can crack the glass.
Du ring reinstallation, be sure to meticulously clean the inside of the glass panel and the face of the LCD as any dust or fingerprints trapped inside will be annoyingly visible when the machine is turned on.

Remove the eight T10 Torx screws securing the LCD to the outer case.

Carefully lay the iMac stand-side down on a flat surface. Due to tight tolerances, you will have to use a thin hooked tool to lift the display out of the outer case. As seen in the third picture, we made one out of a bent paperclip.

Use a thin hooked tool to lift one side of the top edge of the display by its steel outer frame.
After lifting the top edge of the display on one side, hold it out of the outer case while you use a hooked tool to lift the other side. A pencil or pen can be placed under the top edge of the display, parallel to the top edge and extending past the edge of the computer, to keep the first side propped up while lifting the second.
Do not lift the top edge of the display out of the outer case too far, as several short ribbon cables still connect the two components.

Use a pair of tweezers to pull the vertical sync ribbon cable out of its socket on the LED driver board near the top left corner of your iMac.

On some iMacs this may not be a ribbon cable but four separate, very fine and very fragile wires. Be very careful, if the tweezers slip off the plug, you will very likely pull a wire out of the assembly.

Rotate the display out of the outer case enough to disconnect the LED backlight power cable from the LED driver board.

Squeeze the two display data cable connector arms together to unlock it from its socket on the logic board. Pull the display data cable connector away from its socket on the logic board. Be very careful when disconnecting this cable as both the cable connector and logic board socket are extremely fragile. When reconnecting the cable later, use as little force as possible.

Lift the display for enough clearance to disconnect the LCD thermal sensor cable connector from its socket on the logic board. If your fan is spinning full speed after completion, check this connection or the hard drive's thermal sensor cable. The thermal sensor connector socket is very fragile, so be very careful when you connect back the sensor cable.

Carefully pull the display toward the top edge of your iMac and lift it out of the outer case.

The next few steps bring your hands close to the exposed face of the power supply. To avoid a high voltage shock from the many large capacitors attached to the board, do not touch the face of the power supply.

Disconnect the DC power cable by using your index finger to depress the locking mechanism on the back of the connector while you pull the connector away from its socket on the power supply.
Once the locking mechanism has cleared the socket, pull the DC power connector away from the power supply.

Disconnect the AC power inlet cable by depressing the locking mechanism while pulling the connector away from its socket. Remove the following screws securing the power supply to the outer case:

Two fine-thread shouldered T10 Torx
One coarse-thread shouldered T10 Torx
One short coarse-thread T10 Torx

Lift the power supply out of the outer case while gently de-routing it from any wires that may get caught. Two plastic brackets may lift out with the power supply. Their correct orientation is shown in the second picture.

Acer Iconia Tab A500 – Disassembling procedure – how to remove the case – How to remove the battery – How to remove the mother board

Acer Iconia Tab A500:  DISASSEMBLING PROCEDURE 

To start, gently separate one corner of the case using the black spudger. Once you have successfully pried the spudger in between the front case and back case, continue do so around the entire tablet until the back case is completely disconnected.

Locate the 4 screws and cable that hold in the two speakers. Use the Phillips #1 screwdriver to remove these 2mm black screws.

Remove the 2mm silver screws. Not all 4 screws are going to be the same kind. This will not affect the speaker replacement.
Connector Cable Carefully remove the connector cable by pushing on the rim of black plastic insert.

Unfortunately, the top speaker is a wedged under the motherboard. To get this speaker out, use the spudger and gently pry it out. Remove the 5mm screws that are securing the battery to the rest of the tablet. Use the Phillips #00 Screwdriver to remove the 5mm screws.

Use the sharper end of the spudger to disconnect the battery from the mother board. The battery connector will slide off.

Using the Phillips #1 screwdriver, remove the screws near the edges of the tablet. They may be different sizes, the silver are 5mm and the black are 2mm.

Lift up on the black flaps to release the flat cables. Pull this Connector off. Use the spudger to detach the indicated cables. Remove the last motherboard screw under the rightmost cable. It is a silver 5mm.

Disconnect the two gold connectors by pulling straight up on them with your fingers. Like before, lift up on the black flap to detach the cable. Having disconnected all those pesky cables, the motherboard lifts cleanly out.