Symptom-To-Fru Index; Error Messages - Lenovo 3000 C100 Hardware Maintenance Manual

Symptom-to-FRU index

The symptom-to-FRU index in this section lists symptoms and errors and their
possible causes. The most likely cause is listed first, in boldface type.
Note: Do the FRU replacement or other actions in the sequence shown in the
This index can also help you determine, during regular servicing, what FRUs are
likely to need to be replaced next.
If no error message is displayed, check the narrative descriptions of symptoms. If
the symptom is not described there, go to "Intermittent problems" on page 38.

Error messages

column headed "FRU or action, in sequence." If replacing a FRU does not
solve the problem, put the original part back in the computer. Do not
replace a nondefective FRU.
Note
For a device not supported by diagnostic codes in the Lenovo 3000 notebook
computers, see the manual for that device.
Symptom or error
KEYBOARD CONTROLLER FAILURE
The Keyboard controller failed during a
system inquiry about connected devices.
KEYBOARD FAILURE
The keyboard fails to respond, or no
keyboard is connected.
CMOS FAILURE - RUN SCU
A CMOS data error has occurred, probably
because of a loss of battery power.
CMOS CHECKSUM INVALID - RUN SCU
The CMOS checksum error.
RAM ERROR AT LOCATION xxxxxx:
WROTE :xxxx READ :xxxx
The RAM failed during a memory test at the
indicated location.
PARITY ERROR AT UNKNOWN
LOCATION
A parity error occured during a memory test
at an unknown location.
FAULTY REFRESH CIRCUIT
The RAM refresh circuit does not function
properly.
PARITY ERROR AT LOCATION xxxxxx
A parity error occured during a memory test
at the location specified.
NO INTERRUPTS FROM TIMER 0
Timer 0 of the clock timer controller does
not generate system interrupts correctly.

Symptom-to-FRU index

FRU or action, in sequence
1. System board.
2. Keyboard.
1. Keyboard.
2. System board.
1. System board.
1. System board.
1. Reseat DIMM. If the problem still
exists, replace the DIMM.
2. System board.
1. Reseat DIMM. If the problem still
exists, replace the DIMM.
2. System board.
1. Reseat DIMM. If the problem still
exists, replace the DIMM.
2. System board.
1. Reseat DIMM. If the problem still
exists, replace the DIMM.
2. System board.
1. System board.
Lenovo 3000 C100
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