No display on ASUS M2N68-AM SE2

I own an asus M2N68-AM SE2 recently it doesn't show any display[even the bios stetup].I have checked the RAM and GPU and they are fine.The monitor works perfectly on other PC's so there is no fault with it.The motherboard receives power[which is evident by the fact that the processor fan works and cd drive works even the lan blinks on] but shows no display.
I have tried to reset the bios jumper yet no display. What could possibly be the problem.
 
Thanx man 4 the link

But I have already tried all the steps[ still no BIOS display].Could it be the mobo battery?I have an AMD Phenom X2 550 processor & my PC is hardly six months old, could it be the fault of the HDD?
 
You should try another PSU as seanc suggests. The evidence you cite that shows the PSU is working does not prove it is working properly.

Even if the hard drive was faulty, the system should still POST. You could unplug the hard drive altogether and the system should post.
 
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