Video Card Update - No Video with new card.

Hi, everyone.. I'm new to the forum, so please forgive any protocol blunders I may make..

A friend of mine brought over his machine today, and honestly, its got me stumped. I don't have a lot of experience with video boards, so I'm seeking advice.

The machine is pretty old, working perfectly, with GIGABYTE K8NF-9 Motherboard, and a Dell 109-A25900-00 ATI Radeon PCI-E X300, which also works just fine.

He bought an upgrade, an ASUS EAH5550 1GB card, but upon installation there is no video. This is his second card, acting the same.
I tried a board I had laying around, an e-GeForce 7300GS, which was my known-good card, and it doesn't work either.

Putting the original video board back in brings everything back, and working correctly.

I must be missing something simple here... Could anyone lend a hand?

Thanks in advance..

Can we get some specs such as power supply model number?

The power supply is an Antec SL350, 350 Watts.

Other than motherboard, there is a CD Drive and one Hard drive.

Edited by bvos, 16 January 2011 - 10:42 PM.

The power supply is not supplying enough power for the video card to operate.

http://www.antec.com/specs/sl350_spe.html

http://www.amd.com/us/products/desktop/graphics/ati-radeon-hd-5000/hd-5550/Pages/hd-5550-overview.aspx#3

Edited by cryptodan, 17 January 2011 - 02:45 PM.

The video card is not supplying enough power for the video card to operate.

A translation... The PSU is not supplying enough power for the video card to operate.

Thanks DC3, I shouldnt post when I am tired.

Been there, done that, got the links to prove it.

Thanks for the responses! I'll see if I can get my hands on another supply to try this out.

Really encouraging to a forum newbie, to get such concise answers.

Appreciate it.

Edited by bvos, 18 January 2011 - 06:17 PM.