HP EliteBook 820 G3 Notebook – Disassembling procedure – How to remove the battery – How to remove the – Bottom case – How to remove the HDD

HP EliteBook 820 G3 Notebook disassembling procedure 

How to remove Bottom cover

Before removing the bottom cover, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
Remove the bottom cover:
1. Turn the computer upside down on a flat surface.

2. Remove the 11 rubber plugs (1) and the 11 Phillips PM2.5x5.0 screws beneath them (2) from the bottom cover.
Be sure to remove the screws in the following order.

3. Remove the SD card blank and the 1 PM2.0×7.0 screw beneath it (3) that secures the bottom cover to the computer.

4. Pry up on the top (near the display hinge) of the bottom cover to disengage it from the computer (4).

How to remove Battery

Before removing the battery, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover
To remove the battery:

Loosen the captive screw (1) and lift the tab to remove the battery from the computer (2).

How to remove Hard drive

Before removing the hard drive, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is oƫ or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by ƭrst unplugging the power cord from the AC outlet, and then unplugging the AC adapter from the computer.
4. Remove the bottom cover
5. Remove the battery
To remove a hard drive:
1. Loosen the 4 captive screws (1) that secure the hard drive to the chassis.
2. Slide the hard drive (2) away from the center of the computer to disengage it from the connector.
3. Lift to remove the hard drive from the bay (3).

How to remove SSD

Before removing the SSD, follow these steps:
1. Turn oƫ the computer. If you are unsure whether the computer is oƫ or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover
5. Disconnect the battery
Remove the SSD:
1. Remove the Phillips PM2.0×3.0 screw (1) that secures the drive to the system board.

2. Remove the drive (2) by pulling it away from the connector.

How to remove the Keyboard

Before removing the keyboard, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is oƫ or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by ƭrst unplugging the power cord from the AC outlet, and then unplugging the AC adapter from the computer.
4. Remove the bottom cover
5. Remove the battery
Remove the keyboard:
1. Remove the 2 Phillips PM2.5×3.0 screws that secure the keyboard to the computer (1).
2. Position the computer upright with the front toward you.
3. Open the computer as far as possible.

4. Insert a screwdriver or similar thin tool into the hole beside the heat sink/fan assembly, and then press on the back of the keyboard until it disengages from the computer (2). Rotate the top of the keyboard upward, and then lift the keyboard up at an angle to disengage the tabs at the bottom of the keyboard.

5. Slide the keyboard slightly downward toward the palm rest to disengage the top of the keyboard from the top cover (1). Remove the pointing stick cable (2), the keyboard backlight cable (3), and the keyboard cable (4).

6. Remove the keyboard (5).

Samsung Galaxy tab GT-P7500 - Troubleshooting procedure - Power on problem and troubleshooting - Battery Charging problem

Samsung Galaxy  GT-P7500 troubleshooting 

Abnormal charging part

Check C514 whether voltage reading is greater than 5V

Check the TA and the DLC (TA or DLC may not be connected properly)

Check C510 whether voltage reading is greater than 5V

Check U507 chip (U507_OVP chip may not work)

Check C749 whether voltage reading is greater than 4.2V

Check U704 chip (U704 chip may not work at room temperature)

Check battery voltage is change when TA is connected

Check U704 chip (U704 chip may not work)

Check C743 whether voltage is change when TA is connected

Check U704 chip (U704 chip may not work)

Microphone Part

Check main microphone function
in voice call receiver mode

Check the voltage at
C406 = 2.8V

Resolder or replace U404

Check component soldering
statuses of C426, C427

Resolder or replace C426, C427

Speaker Part

Check the signals on R427,R428,R338, R338

Resolder or replace U404

Replace the speaker module

BT/WIFI

BT/WiFi is not working

Check BT or WiFi function

Enable BT or WiFi Function

Check the Voltage on C260 = 1.8V

Check AP PMIC(U703)

Check 37.4MHz Clock at R213

Check OSC202

Check the Voltage on L214 = 1.5V

Resolder or change L214

Check the Status of C282, ANT202

Resolder or Replace C282, ANT202

Resolder or Replace U204

Power On does not work

Check "Power on" by power cable with jig-on

Check the switch circuit, FET gate voltage, FET voltage

Check the 30pin to 50pin FPCB(SLC500), Wrong assembly or Wrong connection.

Check the Battery Voltage is more than 3.6V

Charge the Battery (Battery power is low)

Check U703(PMIC) and Power on voltage(C727≥1.2V, C734 ≥1.2V, C730≥1.8V, C725≥ 1.8V, C728≥1.1V, C723≥3.3V, C720≥2.85V)

Check U703. Change the problem point. (short, open, crack, etc.)
If PMIC has problem, change U703

Check U702(_RESET). this pin has to go high level(about 2V),and to go low level after 480ms
Check U6006(A1,Y1). If you push the power on button ,, A1,Y1 has to go high level.

Check the Clock at OSC700(C718) that frequency is 32K

Check the clock generation circuit (related to OSC700)

check the initial operation

TSP

Touch Screen does not work

Check TSP Connector on Main PBA

Reconnect the SLC1000

U1004 Pin64 = 3.3V(C1033) and Pin8 = 1.8V(C1029)

Resolder or Replace U1004 U1001,1002,1003 Pin A1 = 3.3V(C1000,C1006,C1012)

Resolder or Replace U1001,1002,1003

Check the I2C signal of

Sensor IC(R6050, R6051)

Resolder R6050, R6051

Replace TSP Module

3 MEGA PIX CAM

"Camera" function does not work

Check the Camera connector on Main PBA

Reconnect the HDC900

Check the voltage
C902 = 1.2V
C901 = 2.8V
C913 = 1.8V
C900 = 1.8V

Resolder U900,R900,R902,L900
Resolder U901
Resolder U902
Replace the PBA

Check R903 is 24MHz

Resolder R903 Replace the PBA

Check the I2C line TP902 & TP903 = HIGH

Resolder R6044, R6045 Replace the PBA

Check F900 is OK

Resolder F900 Replace the PBA

Replace the camera module

Initial Failure

CP_RST(R320), PDA_ACTIVE(R6067) >= 1.8V(HIGH)

Check UCP6000 (short, crack, etc.)

CP_ON(TP_CP_ON), PHONE_ACTIVE(TP6024)>= 1.8V(HIGH)

Check UCP300 (short, crack, etc.)

AP_nRST(U703_pin #G8,TP702) "low -> high"?

Replace OSC 300 and OSC700

There are 26MHz wave forms at OSC600(C6082) and 26MHz wave forms at OSC100(C150)

Replace OSC600 and OSC100

LCD display OK?

Check the LCD part(short, crack, etc.)

Sound is OK?

Check the Audio Part(short, crack, etc.)

LCD

LCD is still off after PWR ON

Check the connection of SLC800

Reconnect the SLC800

Check the C818 and High(18V)

Check the Backlight Driver IC(U805)

Check C821 = 1.8V, C823 = 3.3V, C833= 1.2V

Check the LDO(802) DC-DC(U803) DC-DC(U804)

Check the signal DISPLAY_PCLK(TP809) LCD_D(0)(TP801)

Check the IC UCP6000

Check the signal IDISPLAY_PCLK(TP806) LCD_F(0)(TP800)

Check the freq of C813(19.2MHz)

Replace or resolder OSC800

Check the U801

Check C800 = 1.8V, C801 = 3.3V

Check the IC U800

Replace LCD Module

HP Pavilion 11 X2 – dissembling procedure – How to remove the display – How to remove the RTC battery

Disassembling procedure 

How to remove Display enclosure

Before disassembling the tablet, follow these steps:
1. Turn off the tablet. If you are unsure whether the tablet is off or in Hibernation, turn the tablet on, and then shut it down through the operating system.
2. Disconnect the power from the tablet by unplugging the power cord from the tablet.
3. Disconnect all external devices from the tablet.
Remove the display enclosure:

1. Place the tablet on a flat work surface, with the display screen facing down and the rear-facing webcamera toward you.
2. Lift up on the top edge of the display enclosure (1) until the tabs built into the enclosure release from the display panel assembly.

3. Remove the display enclosure (2) from the tablet

How to remove Sensor board

Before removing the sensor board, follow these steps:
1. Turn off the tablet. If you are unsure whether the tablet is off or in Hibernation, turn the tablet on, and then shut it down through the operating system.
2. Disconnect the power from the tablet by unplugging the power cord from the tablet.
3. Disconnect all external devices from the tablet.
4. Remove the display enclosure

Remove the sensor board:
1. Disconnect the tablet battery cable from the system board.

2. Disconnect the sensor board cable (1) from the system board.

3. Disconnect the power button board cable (2) from the sensor board.

4. Detach the sensor board (3) from the display panel assembly. (The sensor board is attached to the display panel assembly with double-sided tape.)

5. Remove the sensor board.

Reverse this procedure to install the sensor board.

How to remove Wireless antenna

Before removing the wireless antenna, follow these steps:
1. Turn off the tablet. If you are unsure whether the tablet is off or in Hibernation, turn the tablet on, and then shut it down through the operating system.
2. Disconnect the power from the tablet by unplugging the power cord from the tablet.
3. Disconnect all external devices from the tablet.
4. Remove the display enclosure
5. Disconnect the tablet battery cable from the system board

Remove the wireless antenna

1. Disconnect the WLAN antenna cables (1) from the terminals on the WLAN module.

2. Release the wireless antenna cables from the routing clips (2) built into the display panel assembly.
3. Detach the wireless antenna transceivers (3) from the heat sink. (The wireless antenna
transceiver is attached to the heat sink with double-sided tape.)

4. Remove the wireless antenna cables and transceivers. Reverse this procedure to install the wireless antenna cables and transceivers.

How to remove Front-facing web camera

Before removing the front-facing web camera, follow these steps:
1. Turn off the tablet. If you are unsure whether the tablet is off or in Hibernation, turn the tablet on, and then shut it down through the operating system.
2. Disconnect the power from the tablet by unplugging the power cord from the tablet.
3. Disconnect all external devices from the tablet.
4. Remove the display enclosure
5. Disconnect the tablet battery cable from the system board
Remove the front-facing web camera:
1. Release the ZIF connector (1) to which the front-facing web camera cable is attached, and then disconnect the front-facing web camera cable from the system board.
2. Remove the Phillips PM1.85×1.60 screw (2) that secures the front-facing web camera bracket to the display panel assembly.
3. Swing the right side of the bracket (3) up and to the left until the bracket releases from the tab
(4) built into the display panel assembly.
4. Remove the front-facing web camera (5).

How to remove RTC battery

Before removing the RTC battery, follow these steps:
1. Turn off the tablet. If you are unsure whether the tablet is off or in Hibernation, turn the tablet on, and then shut it down through the operating system.
2. Disconnect the power from the tablet by unplugging the power cord from the tablet.
3. Disconnect all external devices from the tablet.
4. Remove the display enclosure
5. Disconnect the tablet battery cable from the system board
Remove the RTC battery:
1. Disconnect the RTC battery cable (1) from the system board.
2. Detach the RTC battery (2) from the display panel assembly. (The RTC battery is attached to the display panel assembly with double-sided tape.)