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PC wont boot after replacing video card

Last response: in Graphics & Displays
June 19, 2009 12:22:50 AM

Recently tried to upgrade video card from ati 4670 to gtx 260 core 216, after swapping out the card when i try to turn on the pc it comes on for a faction of a second (Fans spin, Power supply kicks on, ect..) then shuts itself off again. I have tried reseating the card, the ram, made sure all plugs are connected properly. Worse still, I tried putting the original card back in and it does the same thing. Please help.

Gigabyte EP43-UD3L
Intel 8400 core 2 duo @ stock speed
Rosewill 550W power supply
4 gigs G.skill 1066 ram
xp pro 64 bit edition
a c 235 U Graphics card
June 19, 2009 12:24:17 AM

if it happens with the original card also, it sounds like a power cable is not properly seated.
June 19, 2009 12:43:03 AM

I have unplugged all cables and replugged them all making sure they are nice and snug, still getting the same thing though =(
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June 19, 2009 12:46:23 AM

Rosewill PSUs aren't the greatest quality...
a b U Graphics card
June 19, 2009 12:53:57 AM

What happens if you boot up with NO vid cards installed?
June 19, 2009 12:55:06 AM

same thing.
a c 235 U Graphics card
June 19, 2009 1:00:34 AM

check to see if the ram got knocked loose

cpu fan plugged in?

its really hard to tell when you cant see the system
June 19, 2009 1:13:38 AM

Still no go. Thank you for your time and effort though, it is appreciated.
a b U Graphics card
June 19, 2009 1:25:20 AM

Reseat the ram, and double check all power cables. Rosewill is not known as a great PSU. Could be pulling too much power with the new card. Could it have fried when he tried the new card?
a b U Graphics card
June 19, 2009 7:49:05 AM

If you get the same result with two vid cards, and no vid cards, the problem ain't the vid cards lol.

So we need to look for something that took place at the time you made the swap, and still exists.

Did you have trouble inserting the 260? Perhaps damage/short out the PCIe slot?

The 260 requires a PCIe power plug. Does the psu provide that? Did you have trouble inserting it? Short that plug? (Can't imagine this one lol, but hey!)

Do you have another psu to try?

If you remove *everything* (including kb, mouse, and all USB cables) except the cpu and heat sink fan, do you get the same beep sequence? If not, start putting stuff back on (kb, then mouse, then one stick memory, then other stuff) until you get 3 longs, one short.
a b U Graphics card
June 19, 2009 1:40:53 PM

The beep sequence for a missing video card is generally one long and three short beeps.
June 19, 2009 3:52:24 PM

I don't get any beeps at all. I have a 430w thermal take power supply in an older pc I'll stick that in there and post the results
June 19, 2009 4:14:50 PM

ok tried power supply from older pc and it started right up. That's crazy, that rosewill is less than 2 weeks old, and i double checked that it had enough juice to run the 260. I'll return the power supply and stay away from rosewill in the future, thanks everyone for the help.
a b U Graphics card
June 20, 2009 5:44:44 AM

NP. Thanks for telling us what the problem was.