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Other Symptoms
Note: If you cannot find a symptom or error in this list
and the problem remains, see “Undetermined
Problems.”
Symptom/Error FRU/Action
Errors occur only when
MultiPort II is used
1. See “MultiPort II
Checkout” on
page 134.
PCMCIA slot pin is
damaged.
1. Bottom System
Board.
Intermittent Problems
Intermittent system interruptions can be caused by a
variety of reasons that have nothing to do with a hardware
defect, such as electrostatic discharge or software errors.
Consider replacing a FRU only when a recurring problem
exists.
When analyzing the intermittent problem, perform the
following steps:
1. Run the advanced diagnostics test in loop mode at
least 10 times.
2. If no error is detected, do not replace any FRUs.
3. If any error is detected, replace the FRU shown by
the FRU code. Rerun the test to verify that no more
errors exist.
Undetermined Problems
Perform the following procedures to isolate the failing FRU
if the diagnostics tests did not identify which adapter or
device failed, or whether the installed devices are
incorrect, a short circuit is suspected, or the system is
inoperative.
Note: Do not replace a nondefective FRU.
Before performing these procedures, perform the following
actions:
Verify that all attached devices are supported by the
computer.
Verify that the power supply being used at the time of
the failure is operating correctly. (See “Power
Systems Checkout” on page 135.)
1. Power-off the computer.
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.
152 IBM Mobile Systems HMM