Lenovo 7783 Laptop User Manual


 
Undetermined problems
This section provides instructions on how to nd out the failing devices or adapters.
1. Turn off the computer.
2. Remove or disconnect the following components (if installed) one at a time.
a. External devices (modem, printer, or mouse)
b. Any adapters
c. Memory modules
d. Extended video memory
e. External Cache
f. External Cache RAM
g. Hard disk drive
h. Diskette drive
3. Turn on the computer to re-test the system.
4. Repeat steps 1 through 3 until you nd the failing device or adapter.
If all devices and adapters have been removed, and the problem continues, replace the system board.
Chapter 8. Symptom-to-FRU Index 65