Question

CMOS checksum error

Asked by: pthurman

Ok here goes...
  Have a Biostar 8500TAC- A ver3 board with AMI BIOS.

   At first would only boot if I jumpered the "clear cmos" pins.

    Flashed the bios sucsessfully to: ver 77.22, date 7-15-95.
    I now can boot without jumper.

                     Problem is:
                     CMOS won't save settings after shutdown.

                     Settings can be changed and remain in effect until powered off.
                     Then on boot receive "CMOS checksum error, F1 to enter setup" . Or CMOS checksum Bad.

                     I get this anytime system is powered off, even when no settings are changed.

                     I should add that date & time remain correct.

                     I don't see any type of battery that I recognize, or external battery connector.
                     Board works fine otherwise and detects & installs hardware under win95.

                     Board has (3) Flash ROM Type Voltage select settings:
                     1. +5V type  Flash memory used
                     2. +12V type Flash memory used
                     3. Eprom used.

                     Have tried all 3 with no change.

                     What to do?
                     Thanks,
                     Pat
                                                                           

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Asked On
2000-07-31 at 15:11:24ID10867481
Tags

checksum

,

8500tac

,

boot

,

cmos

,

error

Topic

Miscellaneous Hardware

Participating Experts
8
Points
200
Comments
15

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