Hello download the manual here:
http://www.msi.com/service/download/
By entering the ms xxxx number, from the mainboard.
When you find your mainboard, click on download and select manual.
Download the manual, and you need adobe reader to read the content.
Your cmos battery on the mainboard, has lost it`s power and need to be renewed (the bios can`t remember It`s settings)
The battery is a CR 2032 watch type:
And fairly easy to change, with the shinny site upwards.
But you have to setup the bios, clock, date, boot settings when the job is done.
This is why, you need the manual.
Good luck
SOURCE: BIOS CHECKSUM ERROR
Normally a bios checksum error is caused by a dead cmos battery. In a laptop that can be a pain - some are specialty batteries, some soldered directly to the motherboard, etc.
Start the laptop and enter the bois, there usually will be something to tell you what key to press, most of the time it is f2 or f10. Once in the bios set the date, time and boot order, then save and exit the bios. If it boots ok then try to determine what type of battery and it's location on the laptop to replace it.
If you let me know the make and model of laptop I will try to help determine that info and also where you can get the battery. That will more than likely be from eBay....
Hope this helps
SOURCE: Biostar P4M900-M7 SE BIOS ROM Checksum Error
The bios upgrade procedure stopped at half , leaving the bios corrupted. The computer now cannot do a regular boot procedure, this is the reason why it cannot recognise some device. If you are still able to boot from floppy, you can restart bios upgrade procedure from floppy. Just download floppy version upgrade and re do setup. Even if you do not find latest bios version, just download a floppy upgrade that is working, so that you can restart your machine regularly , and then do the update to latest version.
If you are not able to complete the bios setup, the only way to fix your motherboard will be flashing the CMOS chipset with a chip programmer device that will reinstall bios straight into cmos chipset.
You can have this done at the service point, in this case consider also replacing your motherboard.
Regards
SOURCE: Bios ROM checksum error
The rom you used to flash the bios may not have been the correct one for your mobo, or it did not complete the flash entirely. Try using the usb a drive to flash it again and/or revert back to an older version.
SOURCE: BIOS ROM checksum error
have you a hard disk in the pc ?
somehow your hard disk has stopped booting (virus , bad hard disk boot sectors)
you may have to reinstall the OS
hope this helps
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