E-4 POST Error Messages
Table E-1
Continued
Message Beeps* Probable Cause Recommended Action
Invalid Electronic Serial
Number
None Electronic serial number has
become corrupted.
Run Computer Setup.
Audible 2S Power-on successful. None.
Flashing Power and HD
LEDs (simultaneously)
None Unseated backplane (system
will not boot)..
1. Remove backplane.
2. Wipe connector.
3. Reinstall the backplane.
Flashing Num Lock
LED
1S, 2L System memory not present. 1. Check DIMM.
2. Remove and reseat DIMM.
3. Refer to the "Solving Memory
Problems section of this guide.
Flashing Caps Lock
LED
1L, 2S Video controller not present
or incorrectly initialized.
1. Clear CMOS.
2. Remove and reseat video board.
Flashing Scroll Lock
LED
2L, 1S System board hardware
failure (prior to video).
Replace system board.
* L = Long, S = Short
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