I'm guessing you have damaged the BIOS .
Do you have a BIOS 'short jumper'?
Normally located near the battery,it will be 3 pins with either 1 & 2 or 2& 3 connected.
Whichever it is reverse the jumper (i.e. if you have 1 & 2 connected, change it to 2 & 3).
This will discharge the bios, and reset it (provided you have not damaged it)to factory defaults.
You could try starting it in the reverse position, some boards will start others will not.
Leave it in the reverse position for about 2 minutes before switching back to normal.
Have a lok at this page for suggestions. click here