After looking at the referenced post.... your old power supply was putting out 22 volts instead of 12. The possibility of the voltage regulator on the motherboard also being burnt out is very good.
Look on your motherboard for any capacitors that look like the top has popped up on them of has popped up and has some black "goo" coming out of them.
If you find any that exhibit this conditon, you have two choices. Replace the motherboard or possibly find someone locally that can replace the defective capacitors and try the board again with your new power supply.
P.S. I have attached a photo of what "popped capacitors" looks like.
Edited by techextreme, 09 June 2009 - 09:31 PM.