Undetermined Problems (TP 240 - 2609)

Undetermined Problems

You are here because the diagnostic tests did not identify which adapter or device failed, which installed devices are incorrect, whether a short circuit is suspected, or whether the system is inoperative.
Follow these procedures to isolate the failing FRU (do not isolate non-defective FRUs).

Verify that the power supply being used at the time of the failure is operating correctly.
(See 'Power System Checkout'.)

1.  Power off the computer.
2.  Visually check for damage. If any problems are found, replace the FRU.
3.  Remove or disconnect all of the following devices:
   1.  Non-IBM devices
   2.  Printer, mouse, and other external devices
   3.  Battery Asm
   4.  Hard disk drive
   5.  DIMM
   6.  PC Cards (PCMCIA)

4.  Power on the computer.
5.  Determine if the problem has changed.
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 non-defective FRU.
   1.  System board
   2.  LCD panel Asm