Black screen any ideas?

I was using my computer a few nights ago, everything was going fine, was just listening to music as a matter of fact. turned it off, no problems there. the next morning i went to turn it on and low and behold, a black screen of nothing. The computer runs, with speakers on i can hear windows load up, everything seems to work fine, even the graphics card seems to be getting power as the fan on it is still running. its just the monitor isnt getting any signal anymore.

I checked the monitor in another computer and its working fine. I have to use DVI-VGA adapter for my graphics card and monitor, so i tried a different adapter, but still nothing. i tried removing the card from the PC-E slot and replacing it, but still nothing. havent unplugged it yet from the PSU because its a major pain to unplug or plug this one in, im always afraid of breaking the dang thing.

So my question is, in your opinion is it just plain dead, or is it something else that would cause this?

In any case, ive heard somewhere that it might just be that the card isnt switching to the right mode for the DVI-VGA or something, but that didnt make sense to me because i didnt think the card had any idea whether it was connected to DVI connection or a DVI-VGA adapter, i was sure it just sent the signal and the converter did all the work, if you know what i mean.

My personal thoughts were
A) the Mainboard isnt sending signal anymore to the PCI-E slot, so even though the card is running, the card isnt getting anything.
or
B) that maybe my PSU is faulty (i have my suspicions about it anyways) and its just sending enough power to get the fan going but not to send signal from the card or something?

I dont think either are plausible scenarios really. but its the only things i can think of besides the Card being just plain dead.

So any ideas? right now im just banging my head trying to find a decent price on a graphics card to replace this one, since that seems to be my only recourse. only two options i can find still in production are the hd 3650 and the HD 3850.



The card in question is a Sapphire Radeon X1800 GTO, the Main board is a ASUS A8N-E, and im running a thermaltake 430W PSU.