There is little else to try to the board may in fact be DOA. If none of the above produce a beep, we have hit a wall.Does it work with the same CPU, Power Supply, etc? If the board is still dead, if possible, try another mainboard.Even if the power supply runs and the fan spins, etc.

If possible, try a different Power Supply.

At this point, if the system is in a case, take the board out and try it on a test bench setup, anti-static bag on top of case, etc.

If the board is an ATX design, remove AC power from the power supply, unhook the power supply cable from the board, reinsert it and apply AC power to the power supply again.

It is unlikely that the CPU is bad, but if another one is handy, try that to see if a beep is heard. Take the CPU out and reinsert it, making sure it seats well.

Check the CPU for bent or broken pins or damaged contacts.

Check the voltage settings for Socket 7 CPUs.

Set the multiplier to a slower speed such as 2.5. Try the 'auto' setting if applicable rather than specifying a particular bus speed. try a slower bus speed to see if that produces a beep. At this point the board should be running normally.

Nirvana is reached when only the short, single POST beep is heard. If the same beeps are heard, make sure the video card is in all the way or try another card. If there is a long beep is followed by a few short beeps, then reinsert the Video Card. If long beeps that repeat forever are heard, the RAM is most likely either bad or at least incompatible with the board. If beeps are heard at any time, reinsert the RAM. Bent pins will prevent the CPU from seating normally and likely cause hardware errors in your. A drop to the floor or a failed attempt at mounting can easily result in bent pins. It is of course very important to determine that the speaker works before hand if possible and that it is hooked up correctly. A CPU is both a critical and fragile piece of hardware. Try the steps listed below/ After trying each step, power up the system to see if beeps are heard.

How to fix cpu pins