Specifications

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4.Error and Information Messages
During the power-on self test (POST), the BIOS either sounds a beep code or displays
a message when it detects a correctable error.
Following is a list of POST messages for the ISA BIOS kernel. Specific chipset ports
and BIOS extensions may include additional messages. An error message may be
followed by a prompt to press F1 to continue or press DEL to enter Setup.
Beep
Currently the only beep code indicates that a video error has occurred and the BIOS
cannot initialize the video screen to display any additional information. This beep code
consists of a single long beep followed by two short beeps. Any other beeps are
probably a RAM problem.
BIOS ROM checksum error - System halted
The checksum of the BIOS code in the BIOS chip is incorrect, indicating the BIOS code
may have become corrupt. Contact your system dealer to replace the BIOS.
CMOS battery failed
CMOS battery is no longer functional. Contact your system dealer for a replacement
battery.
CMOS checksum error - Defaults loaded
Checksum of CMOS is incorrect, so the system loads the default equipment
configuration. A checksum error may indicate that CMOS has become corrupt. This
error may have been caused by a weak battery. Check the battery and replace if
necessary.
CPU at nnnn
Displays the running speed of the CPU.
Display switch is set incorrectly.
The display switch on the motherboard can be set to either monochrome or color. This
message indicates the switch is set to a different setting than indicated in Setup.
Determine which setting is correct, and then either turn off the system and change the
jumper, or enter Setup and change the VIDEO selection.
Press ESC to skip memory test
The user may press Esc to skip the full memory test.