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CMOS Checksum Bad

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11 replies

by gamnet

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Hi all!I'm receiving an error message "CMOS Checksum Bad Press f1 to run setup" when i start up my pc.

Thinking that the CMOS battery's flat,i changed it but upon reboot i receive the same message.Even changing to default/optimal settings then saved and exit the CMOS SETUP yield negative response.

Also i can hear 2 and 1 short beeps(in that order)before the error message shows again.I've checked AMI BIOS codes/error messages list plus it's version but the 'solutions' confuses me even more!

If anyone could make sense of this fatal error(?), describing me the right step by step solutions would be much appreciated.Thanks.

My pc: Pentium MMX 150MHZ;AMIBIOS Release 01/10/2000S

11 replies

by thechas

If it sounds like you are getting 2 separate codes, (2 and then 1) I would replace the RAM modules.

Either 1 module has worked itself loose, or there has been a failure on 1 module.

Assuming this system has SIMM RAM modules, remember that theymust be installed in matched pairs.

Chas

by dmiles

The error would be stating that you have a memory error

Open the case,check the memory modules to make sure that they are seated properly and have not crept out of the socket

If this does not correct the problem check to make sure that you have updated video drivers and you may need to purchase new memory modules,check by placing one module at a time

Checking the AMI beep codes and they are listed as a single number,so make sure that you have the correct error

by dmiles

The error would be stating that you have a memory error

Open the case,check the memory modules to make sure that they are seated properly and have not crept out of the socket

If this does not correct the problem check to make sure that you have updated video drivers and you may need to purchase new memory modules,check by placing one module at a time

Checking the AMI beep codes and they are listed as a single number,so make sure that you have the correct error,becuase each bios has different beep code signals

by jackofalltech

Just replacing the battery would not fix the problem nor would enabling the default settings.
You need to completely clear the CMOS by either removing the battery for an extended period of time or moving the jumper according to the instructions for your M/B.
After the CMOS has been reset, THEN you can go in and apply your desired settings.

Ralph

by gamnet

Thanks all for your replies! I've finally nailed the boot problem right.Foremost, i didn't 'save and exit' properly after i made my settings the first time i went into CMOS setup!

Next i failed to notice that i had configured the 'Primary and Secondary Master/Slave'setting fields into ALL 'AUTO'.Only when i input IDE as the 'Primary Master' etc...my pc booted up normally!

Mea culpa and thanks again!

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