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NEX 6620A User's Guide
4-2 BIOS Reference - POST Message
During the Power On Self Test (POST), if the BIOS detects an error requiring you to do something to fix, it
will either sound a beep code or display a message.
If a message is displayed, it will be accompanied by:
PRESS <F1> TO CONTINUE, <CTRL>-<ALT>-<ESC> OR <DEL> TO ENTER SETUP
POST Beep
Currently there is only one beep code in BIOS. This 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.
Error Messages
One or more of the following messages may be displayed if the BIOS detects an error during the POST.
This list includes messages for both the ISA and the EISA BIOS.
BIOS ROM checksum error-System halted.
The checksum of ROM address F0000H-FFFFFH is bad.
CMOS BATTERY HAS FAILED
CMOS battery is no longer functional. It should be replaced.
CMOS CHECKSUM ERROR
Checksum of CMOS is incorrect. This can indicate that CMOS has become corrupt. This error may
have been caused by a weak battery. Check the battery and replace if necessary.
DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER
No boot device was found. This could mean that either a boot drive was not detected or the drive does
not contain proper system boot files. Insert a system disk into Drive A: and press <Enter>. If you
assumed the system would boot from the hard drive, make sure the controller is inserted correctly and
all cables are properly attached. Also be sure the disk is formatted as a boot device. Then reboot the
system.
DISKETTE DRIVES OR TYPES MISMATCH ERROR - RUN SETUP
Type of diskette drive installed in the system is different from the CMOS definition. Run Setup to
reconfigure the drive type correctly.
DISPLAY SWITCH IS SET INCORRECTLY
Display switch on the motherboard can be set to either monochrome or color. This indicates the switch
is set to a different setting than indicated in Setup.
either turn off the system and change the jumper, or enter Setup and change the VIDEO selection.
BIOS Setup
Determine which setting is correct, and then
Rev. B0
0301
4-29
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