Resetting/clearing a BIOS chip

Hi geeks,

Im trying to reset The BIOS on a pc but do not quite remember how to do, i believe i have to short something on the chip to clear it?? confused
The BIOS has been been corrupted (cause unknown) and now the machine will not boot.

All and any ideas/advice greatly appreciated!

Thanks

 

I think just removing the button cell battery from the board for a period of time (say 20 minutes) is reckoned to do this in a lot of cases.
On some motherboards there will be a jumper which, in a certain position, will reset the bios.

 

Memory is still there, Jimmy.
Sometimes you can get away with unplugging the power cord and wait for 5 seconds.(Biostar have this feature)
Plug the power cord back in, press and hold the INSERT key

Jumpers:-
To clear CMOS settings. Unplug the power cord, move the jumper cap of from pins 1-2 to 2-3
and leave it there for 5 seconds. Move the jumper cap back to pins 1-2. Plug in the power cord, turn it on.

 

About jumper there is 3-pins.Normaly is on 1-2.When unplug the cell button ,pull the jumper out and connect to 2-3.Wait for about 20 minutes,then reconnect the jumper to 1-2,and return the cell button.BEFORE you do this unplug the electric cord from your comp.

 

Thanks for the advice guys

i just tried what you said, now getting a 4 second beep and no other responses. is this meant to happen?

BTW the Bios im working with is a PhoenixBios 686 Bios

 

do you update the bios.if yes, do you flash it corectly?what was the problem ,so you must resset bios?

 

its an old machine pulled from stores, that wouldnt boot, kept receiving a prompt from award bootblocker v1

'insert system disk'

i dont have the disk so i assumed a full clear and reinstall would do.

 

Several possibilities, from motherboard fault, to cmos battery.
I would test the battery, or replace it, first, as the cheapest option.
Otherwise remove any non essential add in cards, and start with onl one stick of ram, and try booting like that, if it is not already like that.


phoenix Bios
scroll down to Phoenix here.
http://www.amptron.com/html/bios.beepcodes.html

Further bios information, if you want it.
http://www.bioscentral.com/postcodes/phoenixbios.htm

http://www.phoenix.com/NR/rdonlyres/0835996A-6694-4F6D-8243-1030EE040D92/0/postcode.pdf