Reply 1 of 6, by Vaudane
It seems to happen as soon as you turn it on, which leads me to think there's a short circuit somewhere. Check for solder blobs, bits of random wire. Reseat everything, giving it a good clean with IPA and see if that sorts it.
Reply 2 of 6, by kixs
Reply 3 of 6, by Marek
Some boards make this sound when the fan or temperature alert triggers. Can you get a picture on your monitor? If yes, check out the health status in the BIOS setup. Make sure there is no fan alert activated where no fan is connected to the board.
When using a fan, a short beep like this can happen while the fan starts up spinning.
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Reply 4 of 6, by kixs
Reply 5 of 6, by kixs
How about wrong BIOS or corrupted BIOS? How would this show?
I have another one of this boards. It a few month newer and in brown PCB. The bios sticker is quite different. Also the year written on BIOS sticker is 1993 on this one and 1995 on the newer one. Could someone swapped the BIOS chip?
Reply 6 of 6, by manicgamer
Sounds like a duff leaking capacitor. Check all caps with a meter. The buzz is mains static hum which is not being filtered correctly.
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