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2. Check the cables, wires, and connectors for short
circuits and open circuits. Visually check them for
damage. If any problems are found, replace the
FRU.
3. Remove or disconnect all of the following devices.
a. Non-IBM devices
b. Devices attached to the expansion bus
connector
c. Printer, mouse, and other external devices
d. Battery pack
e. IC DRAM card
f. PC cards
Note: Remember that removing the hard disk
drive, an IC DRAM card, or any adapter
or device, might cause configuration
errors. Ignore error code 174.
4. Power-on the computer.
5. Determine if the problem has changed.
6. If the problem does not occur again, 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 non-defective FRU.
Modem card (if installed)
LCD assembly
System board
Related Service Procedures
This section provides information about the following:
“Status Indicators” on page 44
“How to Run the Diagnostics” on page 45
“Error Log” on page 45
“Reset Pushbutton” on page 46
“Checking the Installed Devices List” on page 46
“How to Run the Low Level Format” on page 46
“PC Test Card LED” on page 46
“Fn Key Combinations” on page 47
“How To Run the Keyboard Diagnostics” on page 47
ThinkPad 340x (IBM 2610)
43