Unique problem, need help

[djslv]

Hi all,
I am having trouble with my pc and have just about run out of ideas on how to fix this. During the past few weeks I have noticed small hiccups while gaming. A few days ago gameplay within Modern Warfare 3 became nearly unplayable due to all the video lag. I have also noticed that while restarting sometimes I would get nothing but a black screen. A manual shutdown and reboot seemed to solve this.

I figured this was my video card dying (ati radeon 5770). I went out and got a 6850. Right before I was about to put in the card I went to uninstall my graphics driver for my 5770. I was met with another black screen and had to manually shut down. I didn't think this would matter since I would be putting in a new card anyways. After putting in the new card and turning on my pc, I get just the black screen. No windows startup screen, nothing. No beeps coming from pc either.

I opened the case and turned it on. Card is running properly along with every fan, etc. Just a black screen. I should note that my pc has been idling and running at fine temperatures the entire time. I put my old card back in and I was able to see a windows startup screen but then it turns black. I tried safe mode and again it goes black.

I tried the new card again and absolutely nothing but my pc turning on and a black screen. At this point I am clueless and have no idea what to do or even try. Sorry about the long post but I would appreciate any and all suggestions. This is a custom build asus 790x mb, amd 955 quad core processor, 4 gb g skill ram, antec 650w power supply on windows 7. Thank you for all input!

-Derek

 

[o1die]

Next time you boot up, try pressing f6 to get into windows safe mode. Then see if you can use windows "system restore" feature. Start>computer>system properties>system protection>system restore. If not, you may have to do a format and fresh install of windows 7. Did you connect the power supply lead to your video card?

 

[djslv]

It seems like a gamble on how far I can get before a black screen. Would a format even be worth it though? I mean the video card I just bought won't even get me past a black screen. It makes no sense to me at all as to what is causing this.

 

[djslv]

Yes the power supply is connected to the card the same way it was to my old card. At least I can see a booting screen with the old card, though it is short lived til I see the black screen.

 

[o1die]

I was going to suggest a bios flash, but it's too risky the way your system is behaving. I would request an rma from asus.

 

[djslv]

Ah I just saw your edit. Well this system was built I believe a year and a half ago. You think its a problem with my mother board?

 

[o1die]

Could be the board or the power supply. But try each ram stick one at a time; I've seen bad ram slots cause a no post situation also. I also recommend you leave your setup alone once it's working. Too many folks have a touchy feely tendency with their systems. I worked at dell several times handling computer components. I always had an esd strap when handling the board, cpu, or ram. Once it's running well again, leave it alone.

 

[djslv]

I'm still stuck. With the old card in, windows tells me I can search for repairs or start normally. If I start normally I'm able to get to my desktop and then it black screens. If i go for repairs, it says I can use system restore or not. Both options lead to a black screen. The ram was fine when testing in other slots. Does anybody know how to fix this?

 

[truegenius]

use memtest to test ram without booting to window

but it seems to be a psu problem, try it with another psu (friends psu)