PC is on but no display

gnnsprapa

Honorable
Oct 16, 2013
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0
10,520
I know there are lot of threads about my problem where pc is on but there is no display on monitor(it says no signal), but i have little bit different scenario over here,

My specs:
CPU-FX 8350 AMD
GPU-sapphire 7970 vapor-x 3 gb
Ram-corsair 1300 Mhz 8GB X 2(total 16 gb)
Mobo-asus asus m5a97 r2.0
CPU cooler-H100i
PSU-Corsair 650W

So, before starting let me give you background of my problem, my pc is nearly 4.5 yrs old. i used to have few problems earlier, where while playing heavy graphics game my screen used to go blank and had to restart my system, also i used to open my case, remove GPU and 24 pin mobo connector and place it again after blowing some air and do some religious chants:ange:
and pc used to work fine and after few days same thing happen and i do resolve with what i mentioned.

Then a year back suddenly these problems got worse i was not able to play even single game, and then i got those grey screen with vertical lines, play game for 5 min and boom...sometimes grey sometimes orange or pink. Then i cleaned my system, GPU, CPU and applied fresh thermal paste..and voila....my system started working again..in fact better...

and then just 4 days back i got those vertical line display on my screen again and had to start my system, but this time it was different ...My pc is running, GPU fan,PSU fan, CPU cooler fan and case fans all are running perfectly fine but there is no display on monitor. I tried few things which i used to do earlier and also some of em new things like:

-->remove every component, clean it and placed it back
-->hold down power button for 30sec-1min
-->take out CMOS and dump the CMOS memory by changing jumpers pin
-->changes RAM slot and tried with each of em
Now the thing is i dont know, but from past 2 days i am trying to get it fixed, after numerous on/off and removing GPU and 24 pin mobo power connector my pc start..works for 5 min and then vertical grey lines and again i have to do lot of things and bit of luck my system starts again, so its like if i sit for an hour keep resetting my pc power ,randomly i get display.

What you guys think, is it because of my mobo, PSU or GPU. I dont have any spare PC to check my components. i have tried all possible ways but no luck. i know there are many limitations without checking each component on some other PC, but if there is something else i need to try please let me know, don't want to hear that my PC took its last breath 🙁

apologize for long post, but couldn't explain in short.
TIA
 


well, my GPU fans are running fine, i mean atleast that's how it looks to me...and also about cooling..the times i got lucky and i got display(3-4 times in past 48 hrs)..i checked the temperature log..and they were fine like 38-40 deg C..

Can it be like...my psu cuts -off or lower the output power to my GPU or other components.?

 
usually when you over-stress a PSU it resets/restarts the computer. It doesn't selectively shut off bits and pieces of the computer. The fact that the fans are running indicate that the GPU is getting power. Again, the quick/easy solution is to remove the GPU and try it in a different computer, even if that involves taking the GPU to a shop to check it in one of their computers. Or, if you have access to another GPU, try installing that into your computer.
 
Well here are more inputs, yesterday I cleaned my system..I mean breadboarding..then tried switch on/ off couple of times and my system got alive..like earlier when it used to shutdown with vertical grey lines display it ran whole night..though I didn't play any games..then today when I started it was fine and after couple of hours boom..vertical grey display again..
I did some analysis..like..I removed gpu and switched on my system.. I saw my mouse and keyboard got alive but no display obv coz I didn't connect my video output ..but main thing is when I switch on my PC with gpu even my mouse or keyboard doesn't glow but without it ..they do..so I guess here my culprit is gpu..but again..can I assume may be gpu not getting enuf power from psu or something else..what u guys suggest,
Is there anything I should open my gpu and look for particular thing..it's not in warranty and earlier too I have opened it.
Also, I have checked my CPU gpu temp they were fine..
CPU idle-7 Celsius
Gpu-38 Celsius..