Black Screen after installing new Card

So I bought an HD4850 and installed it on my comp, after successfully installing the video card i turn the computer on but nothing appears on the monitor but the cpu is on bcause there are lights and fans are running. I also put my old video card back but still have a black screen, I heard something about changing something in your BIOS but how can i do that if nothing appears on my monitor.please help me with my problem thank you.

Hi Did you plug in the PCI 16 six pin power plug on theendof the card?

wow, sounds familiar, yet a little higher end

Have you tried any other PSU?gigatrainer

Trying never hurts, it can be a problem with those PCI-e connectors and the GPU could be getting the power from the PCI-e slots. But your GPU is also giving errors on 2 other PC with different parts?gigatrainer

If you can test it on another computer with a PCI-e motherboard I would that, also it could mean the motherboard is blown to hell as well, which I have ran into many times at work and at home. Have you tried resetting the CMOS battery? Also does the computer display POST or is it the instant black screen of doom?xXDrPainXx

In BIOS, you need to make sure that it is set to boot from the pci-express slot, not onboard. Also, what is your power supply make/model? Also list your wattage and +12v amps. If you are unsure how to check this, take off the side panel and look at the sticker on the side of your power supply. If you can't even get into BIOS, then you might need to reset cmos. Which is real simple, just remove the battery on your motherboard and replace it. This will reset your bios to its original settings. But the most important thing is to post your power supply info.

In BIOS, you need to make sure that it is set to boot from the pci-express slot, not onboard. Also, what is your power supply make/model? Also list your wattage and +12v amps. If you are unsure how to check this, take off the side panel and look at the sticker on the side of your power supply. If you can't even get into BIOS, then you might need to reset cmos. Which is real simple, just remove the battery on your motherboard and replace it. This will reset your bios to its original settings. But the most important thing is to post your power supply info.

DistortedGecko

Make sure your video card is seated in the slot properly,sometimes you have to push down pretty hard until it snaps in firmly.Maybe your power supply has insufficient voltage/amps or is just going bad..

Make sure your video card is seated in the slot properly,sometimes you have to push down pretty hard until it snaps in firmly.Maybe your power supply has insufficient voltage/amps or is just going bad..

DarkSidexxx

by the way i broke the white plastic with alot of tiny holes on AMD socket 940..is it still ok to use that motherboard?Arctic_Grillz

I actually had this same problem after putting my old 8800GT in the computer im at currently. Apparently one of the sticks of RAM went bad. Weird cause it worked perfectly before putting the card in. Make sure you didn't knock any other important cables inside off. The motherboard could've also crapped out if resetting the CMOS didn't work. Isn't socket 940 like, really outdated now? Might be the right time for an upgrade to AM2+/AM3 or LGA775/1366. Did you really buy stuff from Best Buy? I remember a 8600GT being just as much as my 8800GT from newegg, quite sad.

[QUOTE="Arctic_Grillz"]by the way i broke the white plastic with alot of tiny holes on AMD socket 940..is it still ok to use that motherboard?Bane_v2

I actually had this same problem after putting my old 8800GT in the computer im at currently. Apparently one of the sticks of RAM went bad. Weird cause it worked perfectly before putting the card in. Make sure you didn't knock any other important cables inside off. The motherboard could've also crapped out if resetting the CMOS didn't work. Isn't socket 940 like, really outdated now? Might be the right time for an upgrade to AM2+/AM3 or LGA775/1366. Did you really buy stuff from Best Buy? I remember a 8600GT being just as much as my 8800GT from newegg, quite sad.

ChubbyGuy40