Lenovo T14 Gen 2 Hardware Maintenance Manual page 47

2. Visually check each FRU for damage. Replace any damaged FRU.
3. Remove or disconnect all of the following devices:
a. Non-ThinkPad devices
b. Devices attached to the dock
c. Printer, mouse, and other external devices
d. Battery
e. Hard disk drive or solid-state drive
f. External diskette drive or optical drive
g. Memory module
4. Turn on the computer.
5. Determine whether the problem has been solved.
6. If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
7. If the problem remains, replace the following FRUs one at a time (do not replace a nondefective FRU):
a. System board
b. LCD assembly
.
Chapter 4 Related service information
41