System boots but no display?

tummelv · 2 May 2011 at 11:02

CPU: i5 750
Ram; 4gb ddr3
Gpu, ati 5770
Os; win 7
Psu; corsair tx650

Recently my computer stops displaying a video signal when I turn it on. The computer seems toboot up fine but there is no video. When I open up the cd drive and put in a disc it seems to spin up and load it ok. I suspect the computer does reach the desktop although without a display I cannot be sure of this.

I have bought an internal speaker as my antic 300 does not come with one. When it Arrives I will plug it in and hopefully diagnose the problem from the beeps.

I have tried repositioning the ram in different slots and even running just 1 stick but no joy. I have tried reseating the gpu several times as well. I tried using a different monitor and different mi
Monitor and different monitor cable. I have Also tried a different 6 pin pci connector on my psu as well in case it was faulty.

Any ideas?

stulid · 2 May 2011 at 11:03

Well do you hear the windows jingle from your speakers if you suspect its getting to the desktop?

Emphacy · 2 May 2011 at 11:04

You got any speakers plugged in? If you can hear the windows boot-up sounds then it's your graphics card.

RJC · 2 May 2011 at 11:04

Is it possible to test the components in another pc?

Were you running overclocked, perhaps try a CMOS reset if you have not already done so.

tummelv · 2 May 2011 at 11:06

I turned off window sounds so no I wouldn't be able to hear the jingle.

tummelv · 2 May 2011 at 11:09

None of my components are overclocked.

I don't have a spare pc to test components in.

I thought of going to pc world and buying the cheApest gpu they have to try and confirm whether it's my gpu which is faulty.

RJC · 2 May 2011 at 11:15

Have you tried a CMOS reset just to rule out the BIOS throwing a temper tantrum.

tummelv · 2 May 2011 at 11:20

I do that by removing the battery and shorting the jumper with a screwdriver yeah?

olivier renault · 2 May 2011 at 12:21

should be in your motherboard manual, but it can be something like that (usually a jumper rather than a screwdriver

). You may have a button on the motherboard to reset the CMOS.

tummelv · 2 May 2011 at 15:04

Had a thumb through the manual. It seems to reset the CMOS all you have to do is put a screwdriver on the pins for a few seconds to short them, so I'll give that a try!

tummelv · 2 May 2011 at 15:18

Nope. Resetting the CMOS doesn't seem to have done anything.

blackn3r · 2 May 2011 at 16:11

can you boot into safe mode?

also try taking out the gpu so the sytem reverts to the onboard graphics...

tummelv · 2 May 2011 at 16:34

There is no picture so I don't think booting into safe mode would work? Unless somehow getting into safe mode suddenly brings the picture up. I'll give it a try Anyway.

I don't think this mobi has onboard graphics as there is no VGA/dvi slot coming off the mobo. So if i removed my gpu I'd have nowhere to plug my monitor into.

It's a gigabyte ga p55 ud3

tummelv · 4 May 2011 at 10:22

My internal speaker came today. Popped it in and it emits 1 long beep followed by 2 short ones. According to my mobo manual this means either monitor or graphics card failure. I know the monitor is fineso it must be the gpu.

What do you reckon guys? My gpu failed? Would it be worth a trip to pc world to pick up a £30 card to give it a try? As I said I tried reseating it so I think it's more than it just popped loose.

Edit; I forgot to mention that nine times out of ten the gpu,s fan seems to spin at 100%. again this would kndicate faulty gpu?

tummelv · 4 May 2011 at 22:29

Just an update:

I bought an Ati 4350 tonight and gave it a try. It worked perfectly and the PC loaded first time. So looks like indeed my Ati 5770 is faulty, time to get browsing ocuk for a new one I think.