Radeon 9800 boot problem

I have a new Radeon 9800 Pro video card. When I put my new Radeon in, I get no image (can't get into bios, because you can't see anything) until the Grub boot loader starts to boot. When the system gets to this point all I get is flashing green lines across the screen. I have a Soyo Dragon 2 Platinum motherboard. If I put it into my boyfriends computer, it has no problems. Has anyone else had this problem or have any ideas on things to try. It's really frusterating.

Thanks for any help.

I have the exact same problem - did you find the answer?

Try connecting monitor via DVI-VGA adaptor. It worked for me.

Yeah so last march I built my new gaming rig in anticipation of HL2. I got a 9800pro 128, top o the line then. Worked great!

Well recently I’ve been playing a lot of EQ2 and my gf has got into it, so I bought a second account. The second account I played on my old rig which is a P3 1 gig with a G-force FX 5200. It hangs but not too well. So I figured I’d buy another 9800 for it and hope that it would make the game smoother so my gf and I could jam at the same time.

Well I just spent the last 6 hours troubleshooting a blank screen. No posts no beeps nothing, monitor didn't give the tell tale click of activation. NOTHING. Well I was sure pissed I just went out and spent $200 on a gfx card that wouldn’t work.

Anyway I digress, the point. I believe I have found the cause of this type of problem. If you look at the requirements on the 9800pro box it will tell you the minimum power supply allowable is 300W, well?! If you were to look on the old box from the 9800pro I bought 9 months ago you will see the minspec is a 350W power supply.

So I ripped the 450W power supply out of my new comp and stuffed it in my old 1 just to see. Booted like a charm.

The thing that does strike me as odd is this, Last summer I smoked my mobo at a lan party, not knowing right off hand the mobo was fried I first suspected the power supply, (probably due to the flames that shot out of the exhaust fan when it smoked.) all I had laying around was a 300W PS so I plugged it in and instantly got a error beep and an onscreen message that stated my power supply was under spec.

Strangely enough if I take the older 9800 and plug it into the 300w PS I bought tonight it instantly beeps and tells me of the inadequate power. Plug the new 1 in and nothing.... blank screen.

At some point something changed on the card, which stopped the handy beep and message. Also I think someone at ATI came up with the idea that the 9800 would run on a 300W, which it clearly dos not.

Summary

ATI Radeon 9800 pro "actually needs" a 350 watt Power supply. Not the 300w the box requirements state

Soory about the short novel but if others were as flustered as i was I hope this give some answers