HELP ME PLEASE

[element2k5]

My gigabyte 7zx keeps giving me a cmos bad checksum error....
1. What is it
2. how can i fix it
3. why does it happen

 

[Insidious]

Checksum is a value which is derived with a mathmatical function of all the bits in the software which is flashed to the EPROM of your MoBo.

each time the MoBo boots, it re-calculates a checksum and that answer should match the answer from the original calculation where the checksum

value was derived and saved. When the software becomes corrupt, the bits have changed and cause a differing result between the past and present

checksum values. so you are shown the error to let you know you have corrupted software.

This error could come from flashing your MoBo incorrectly, (power fluctuations can cause bad data to be written, for example). You could also have a failing EPROM (the chip which contains the CMOS code... this is what gets changed when you "flash new BIOS". Or you could have some other hardware failure in your CPU or MoBo.

The easiest way to fix this is to clear CMOS variables (check your MoBo manual to learn how) and reset them.

didn't work? Next step is to download the latest version of bios software and re-flash your MoBo (see mobo manual, and/or MoBo website for instructions)

didn't work? get a new EPROM (these are socketed on your MoBo and not too expensive.....) and then try to flash it.

didn't work? you probably have a broken MotherBoard.



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IMPORTANT NOTE: There are many in this forum that know more about this than I do, wait for some more posts to get more ideas

 

[Lanyap]

Check your FSB (Front Side Bus) speed setting. Had a DFI AK76 MB that I forgot to set jumpers to 100 and was set to default of 133. When I tried booting with a 750 Duron I would get BIOS checksum errors. Took me awhile to realize this was the problem and I thought my BIOS was bad.