I'm NOT an expert ! But maybe this might help :
I learned that the mainboard's BIOS (Basic Input/Output System) produces a normal short beep when nothing is wrong, and an error beep or pattern of beeps when something isn't right to give a crude indication of what has gone wrong during the POST (Power On Self Test)
Below is a link for BIOS POST codes. The main players are Award, AMI, Phoenix. If you are not sure about your BIOS type, your manual should tell you the BIOS type - if you do not have a manual, try to downlaod it from the net.
Else, you may be able to identify the BIOS type by reading the name on the chips on the mainboard, BUT if you really have to look inside the box, BE SURE TO DISCONNECT THE POWER before opening the box - read the SAFETY INSTRUCTIONS in a computer manual FIRST.
Here is the link for BIOS POST codes:
With my limited knowledge as a beginner, I hope this helps.
Good luck and never lose heart ! :-)