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no signal to monitor - graphics card? psu?

D

dogooder

Member
Hi, I just bought a new graphics card and after a day of working fine, I can't get a signal to the monitor. I think the problem is with the graphics card. I've searched a little on this forum, so when I go home I'll check/redo all the connections and see if I can isolate the problem, although the only thing that's changed is the new graphics card. But I would appreciate any help.

History (as accurately as I can remember):

Received yesterday around noon. Put it in, turned on the computer, heard a loud long beep, maybe 8 seconds before I turned off the computer. Rechecked the connections (possibly took out the card and placed it back in). Started the computer again, no beeps but couldn't get the monitor to work. Restarted again, finally monitor worked with no other problems.

Early evening, turned on computer again, everything worked fine.

Late last night, tried again with no problems.

This morning, turned it on, no signal to the monitor. No beeps, but the fans ran. Reseated the card but nothing changed.

History of old card:

Worked fine for 10 or so months, then about a week ago it shut down and restarted in the middle of a game. It worked okay for a few minutes, then got really weird graphics (some of the units weren't colored properly, were blue-silver that looked like how it should be shaded) and restarted few seconds later. Then it kept restarting at different places. Only got to Windows a couple times--after a minute or two and more weird graphics it restarted again. RMA'ed my graphics card, they didn't have a replacement, so I bought a new one.

Other thoughts: The graphics card has smears and fingerprints on the back, which makes me a little suspicious. Also, my old graphics card (6800GT) had a separate power cable, but the new one (7600GT) doesn't--could it be a PSU issue? (I think it's a good 350W, with little attached.)
 
have you tried putting your graphics card into another motherboard?

that would atleast eliminate the mobo from the equation.
 
I rechecked all the connections and nothing worked, except one time--it started like normal but stopped because I didn't have a keyboard plugged in. After I plugged it in and hit continue, it booted normally until right before it would usually go to Windows. Then there was a really weird error, I don't remember what it said but I hit ctrl-alt-del (it was a reflex), then no signal to monitor, same as before.

I connected the PSU to an older computer and it worked fine (admittedly, much less power was required). I can't check any of the other things on that computer though.
 
I think I've isolated the problem.

I couldn't get it to POST or beep at all, even using only the mobo and CPU. I took out the CMOS battery, let it sit for a bit, replaced it and restarted with mobo, CPU, RAM, video card, and got repeating beeps about 2 secs long, indicating the memory was bad. I have 2x512, and I can now POST and go to Windows with one memory stick (doesn't matter which) in the second slot (out of four), but it doesn't work at all (get the same beeps) if I put either in the first slot. So it seems it's a motherboard error. I guess I will RMA it.

Does this sound right?
 
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