Remove The Lcd Panel; Remove The Edp Cable; Remove The Microphone Rubbers - Lenovo ThinkBook 14 G4 IAP Hardware Maintenance Manual

LCD Self Test
When you turn on the computer and the LCD goes black, run LCD Self Test to help you determine whether
the LCD functions normally.
To run LCD Self Test:
1. Ensure that the computer is connected to ac power. Then, press the power button for about seven
seconds to turn off the computer.
2. Press Fn, left Ctrl, and the power button at the same time. If the computer displays five solid colors in
sequence across the entire screen, it indicates that the LCD functions normally.
3. The test lasts for about 20 seconds and then exits automatically. You also can press the power button to
exit the test.

Remove the EDP cable

Make sure the following FRUs (CRUs) have been removed.
"Remove the LCD module" on page 77
"Remove the hinge cover" on page 78
"Remove the LCD bezel" on page 79
"Remove the LCD panel" on page 81
Step 1. Disconnect the EDP cable from the camera board and then remove the EDP cable.
Figure 84. Remove the EDP cable
Go to
https://support.lenovo.com/partslookup
replacement parts:
EDP cable
Removable tape

Remove the microphone rubbers

Make sure the following FRUs (CRUs) have been removed.
"Remove the LCD module" on page 77
"Remove the hinge cover" on page 78
82
Hardware Maintenance Manual
to look up the Lenovo part numbers of the following