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no signal on boot

K

killernerd

Limp Gawd
Joined
Mar 8, 2012
Messages
215
So recently (as in, since about a week) my pc has found a new hobby...

It will POST, it will beep and it will even start up completely and correctly but the gpus will not "turn on". Or will not give a signal to the monitors.
The fun part is that i can actually use teamviewer to access my computer and it will show up just fine.

I can do whatever i want through teamviewer but my 2 monitors will remain on standby.

It will eventually turn on but it can take anywhere from 1 to 30+ minutes and depends solely on luck.

I have tried:

- clearing the cmos (worked once)
- disconnecting the power for a minute and pressing the power button a couple of times to discharge it as much as possible. This also worked once.
- disconnect the monitors, power up the pc untill it has completed its POST (it beeps when it does that). Turn it off, plug monitors back in, boot up pc again. This has saved me today but i'm not sure if it will work again tomorrow.

The only thing I haven't tried is updating the drivers but since "waking up the gpus" is the bios' task and therefore happens before the drivers are even loaded i doubt they are the culprit.

Once they do wake up i have no issues anymore whatsoever. They run just fine under full stress so I have no clue as to what might be causing it.

I have also done no system (hardware nor software) changes recently and it really came out of the blue.

My system specs:
2x club 3d 7970 (non GHz edition)
asus rampage IV extreme
i7 3820 (don't judge me, i know T.T )
16 gigs of corsair dominator
1050 watt psu
OCZ vertex 3 ssd (120gig) with os on it
3 data drives

my monitors are two iiyama X2483HSU's both connected to my main gpu, one through it's DVI port the other to an HDMI using a DVI -> HDMI adapter.

I will try updating the drivers but as stated above I don't think it will solve much...
 
2 things check 12V in the bios after it has been on for 5 minutes. Normally if it fails it should not turn on at all.

Bios uptdate.

If that fails go back to a 1 card solution and get it stable to boot and work from there.
 
well i saw the monitor name and it didnt click as one ive ever seen before so shot in the dark and try a different monitor. do the fans spin at all when you turn the computer on? ive seen something like this before with windows 7 and a radeon 6750 card. the way it was solved was reinstalling windows.
 
i was thinking about a psu failure as well but that would seem strange as i can run my system at full throttle for hours on end without issues.

As far as i'm aware this is the latest bios but i'll check just to be sure.
 
techtechie said:
well i saw the monitor name and it didnt click as one ive ever seen before so shot in the dark and try a different monitor. do the fans spin at all when you turn the computer on? ive seen something like this before with windows 7 and a radeon 6750 card. the way it was solved was reinstalling windows.
Click to expand...

well yes... As i said in the OP apart from the gpus the pc boots up normally. I can even access it through teamviewer and it will appear to be normal from the accessing computer's POV.
 
when your rebooting next time try and get into safe mode. safe mode doesnt use any of the driver except the ones that are present after a fresh windows install. this can help narrowing down to see if a driver is at fault. if it was a psu failure nothing would power on.
 
if your computer posts, there is nothing wrong with the gpus per-se. The gpus are are required to spin up to full 3d-clocks on post, then settle back to 2d clocks. If it failed to do so, you wouldnt post.

im thinking its the monitors, i find it hard to believe 2 legacy timers are acting up simultaniously.

do you have another monitor to test? i would also try one monitor at a time, and try a different hdmi cable.

Also, your CPU is a SB-E, remove the cards and test iGPU on each of the monitors.

also, dicsonect both monitors, then reconect once the desktop is up and see if they come on right away.
 
Last edited:
@techtechie That's kinda useless, when the pc POSTs there are no drivers loaded yet. It's a simple matter of the gpus spinning up and going into text mode. Then when windows (and the drivers) are loading they switch over to graphical mode. So I'm 99% sure it's not a driver issue.

@the mac: the monitors is what i thought as well. The gpus do produce a signal (proven by the fact i can use teamviewer), on the other hand the odds of a dual monitor failure happening seem rather small.
More so because they're not even a year old.

My pc booted up correctly on the first try today but I will add your suggestions to the list for when things go wrong again.

Thanks for the help :)
 
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