No video, pc boots (maybe) then dies

Xfx Hd-695x-znfc radeon hd 6950 graphics...
September 1, 2011 at 18:43:39
Specs: Win 7 64bit home premium, Intel core 2 quad, 4gb ddr2 ram
I've had my pc for a couple if years now, intel quad core (can't rember the exact model right now... Q4600? Maybe it's 6400 vOv ) 4g of ddr2 ram and just 6months ago put a radeon 6950 in it. It's been going fine until I just moved house yesterday, went to plug it in today, and the monitor gets no signal, the pc seems to be booting, it sounds like the hd is being accessed, then about 30 seconds in, it just dies, has no power for a couple of seconds, then after 3-5 seconds it fires itself up and goes through the same process all over again in a loop until I turn it off.

I've made sure the ram and video card and as many other things as I can are seated properly, but still no video. I've checked the cables to the monitor and my vid card has two monitor outputs and I've tried both with the same result.

Any thoughts? Im starting to think this is a more serious problem than just the video card


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#1
September 1, 2011 at 19:07:03
My first guess would be that something is loose. Are the power cables connected to the wall or a surge protector? Try another wall outlet. Also, try another monitor. If neither one of those solve the problem, my next guess would be the power supply.

How do you know when a politician is lying? His mouth is moving.


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#2
September 1, 2011 at 23:03:52
I've checked as many connections and cables that I can find, but there's no change. The power cables have always been plugged into a surge protector, and since having this problem, I've tried a couple of different wall outlets, and also a couple of different surge protectors. Still no change. Is it possible for the power supply to die from maybe being bumped around a little during a move? My PSU is a Corsair, and I've heard they're one of the most solid units around.

There are no beeps on startup and the fan seems to go full speed then after a few seconds, backs off a little bit. Then after another couple of seconds goes back to full speed and alternates like that for a bit before sounding like it's accessing the HD and making normal bootup clicks, (but who knows when there's no video,) and then just dies and starts the process all over from the start.


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#3
September 2, 2011 at 00:49:15
Something was banged around, that's for sure. Before I recommend another power supply, I wanted to suggest things that don't cost any money. That's why I said to try another monitor as well.

You mentioned the oscillating fan. There are two fans. Which fan is doing that? What about the other fan?

How do you know when a politician is lying? His mouth is moving.


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#4
September 2, 2011 at 14:59:58
Don't have access to another monitor at the moment unfortunately, but I don't think there's a problem with the monitor.

I actually have a couple of fans in my case, and I have a hypercooler unit installed on my cpu as well. I think it's the cpu fan that I can hear changing speeds, because the case fans all seem to be consistent and the outer fan on the hypercooler isn't going at all.


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#5
September 2, 2011 at 15:38:05
It's no sense in guessing which fan is changing speeds. Open the box to be sure.

How do you know when a politician is lying? His mouth is moving.


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