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Troubleshooting Symptom Charts/Video - 26
Screen is black, no
boot tone and drive
does not operate, but
fan is running and
LED is lit
1 Reset Cuda chip. (Refer to “The Cuda Chip” in Basics chapter
for instructions.)
2 Reset logic board. (Refer to “Resetting the Logic Board” in
Basics chapter for instructions.)
3 Remove all SDRAM DIMMs and try replacing them one at a
time to test. Replace any bad DIMMs.
4 Replace logic board.
5 Replace power supply.
6 Replace processor module.
Boot tone is present
and screen lights up,
but nothing is
displayed on screen
1 Reset Cuda chip. (Refer to “The Cuda Chip” in Basics chapter
for instructions.)
2 Reset logic board. (Refer to “Resetting the Logic Board” in
Basics chapter for instructions.)
3 Replace monitor cable.
4 Test with known-good monitor. Replace monitor if necessary.
Refer to appropriate monitor manual to troubleshoot
defective monitor.