
Quick Troubleshooting Guide
C-3
POST Error Messages
Continued
Error message Probable Cause Recommended Action
System BIOS Shadowed System BIOS copied to
Shadow RAM.
Status message. No action
required.
System Cache Error RAM cache failed the BIOS
test.
Run Setup.
System CMOS Checksum
Bad
CMOS is corrupted or
modified incorrectly.
Run Setup.
System RAM Failed at
Offset,
nnn
System RAM failed. Replace memory modules.
System Timer Error DMA, timers, etc. Replace the system board.
UMB Upper Limit Segment
Address
nnn
Displays the address
nnn
of
the upper limit of Upper
Memory Blocks, indicating
released segments of the
BIOS.
Status message. No action
required.
Video BIOS Shadowed Video BIOS successfully
copied to shadow RAM.
Status message. No action
required.
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