Lenovo 21DK0047IX Hardware Maintenance Manual page 64

Figure 45. Disconnect the EDP cable and remove the LCD panel
Go to
https://support.lenovo.com/partslookup
replacement parts:
LCD panel
Removable tape
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 53
"Remove the hinge cover" on page 55
"Remove the LCD bezel" on page 55
"Remove the LCD panel" on page 57
Step 1. Disconnect the EDP cable from the camera board and then remove the EDP cable.
58
Hardware Maintenance Manual
to look up the Lenovo part numbers of the following