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'many short beeps' sometimes indicate a bad power supply.
When your MBR recieves not the right power it will disrupt the power good signal, this will turn your pc off...

Hey,

your depends on the kind of bios,

Award, Phoenix, AMI...

go to this site: http://www.bioscentral.com/misc/interrupts.htm

they have the beep codes for all the major vendors.