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Author Topic: cmos checksum error - default loaded  (Read 2486 times)
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« on: September 23, 2005, 01:53:34 AM »

My computer(motherboard) is now new. I have changed the BIOS battery.... now I always see the message below, whenever I'm starting my computer:

cmos checksum error - default loaded

Press F1 to continue, press Del to enter to setup

it doesn't allow me to boot using floppy, CD, etc..

while I'm pressing DEL I will see CMOS Setup... I was changing some options (first boot device, second boot device...) but after rebooting I will see that nothing have been changed.

Please help me what should I do?

« Last Edit: September 23, 2005, 02:00:36 AM by asadi » Logged

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« Reply #1 on: October 05, 2005, 06:50:42 AM »

Dear Asadi
As you know CMOS checksum error is initiated whenever we have a dead battery. So I think what you did is corret. But be sure if the replaced battery is a working one. Some times you can encounter dead batteries out of their packages. Buy from reliable stores. In addition to this check if the socket has rust or dust and if you find  a sign clean it before going to buy another battery.
Without a working battery the memory dosn't store the new  information you changed in the CMOS setup and will not allow you to boot using floppy, CD, etc.. It continues to use the factory default settings instead.

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