Solved graphic card no signal after flashy power outage

May 4, 2015 at 21:10:05
Specs: Windows 7
Hello, i have a problem

the other day we had a flashy blackout, after that my graphic card stopped giving signal to my monitor...

i had a ASROCK N68C GS FX MOTHERBOARD...
and i have a GEFORCE GTX 650 GPU,

i tried an old GPU and didnt work too... so i tried using my old MOTHERBOARD and both GPU worked...

so i bought a new MOTHERBOARD and it still not giving any signal from any of both GPU...

my new MOTHERBOARD is a ASROCK N68 GS4 FX

the energy cable is connected to the GPU, and i've installed the drivers already...

i got the mention that i didnt re-install my OS because it worked properly due the same brand of MOTHERBOARD....

i tested my HDMI and VGA cable from my monitor in another computer and its working...
i tested the VGA cable in MOTHERBOARD'S connection and its working

so... the GPU is working... the MOTHERBOARD is new... so what's going on

please someone help me


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✔ Best Answer
May 5, 2015 at 20:05:08
To restate:
New MB works with integrated graphics.
Power supply works on another machine, even with the same graphics card.
PC does not work with old or new motherboard with the combination of power supply and existing graphics card.
You did not reinstall Windows.

Try:
Flash BIOS with latest.
Reset BIOS to defaults, then manually set BIOS to best for primary hardware.
Make sure that you install all drivers for new motherboard, do it with onboard graphics and if necessary, do it in Safe Mode.
Try reseating graphics card a couple of times in case tarnish in socket.
Make sure PCIe power connector is attached, if more than one is available, try both one at a time.
Make sure that if there are more than one PCIe 16x connector, use the first one (top one) or see manual.
Make sure that all case posts are under correct spots on motherboard, all have screws, there are non under motherboard where there is no mounting hole, and there are no mounting holes without post under it.
In BIOS primary graphics is set to PCIe 16x slot or 'PCIe 16x if present' depending on options for your BIOS.

If any assumptions are incorrect, please let us know.
Post back all results. Remember, try one change and test so you know what works and don't have to back track and try a couple again in different combinations.

You have to be a little bit crazy to keep you from going insane.



#1
May 4, 2015 at 22:04:07
I can't tell from your description if you've ruled out the power supply as the culprit. Just because fans and drives spin up and LEDs flash doesn't mean it's good. It takes several voltages at sufficient current to power the motherboard.

Are you sure the 'new' motherboard is good and you installed it correctly? Did you use the cpu from the old board?


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#2
May 4, 2015 at 22:12:31
i used the same cpu from my old board, and its compatible with the new one, all the power cables are in the correct place and i can run my pc correctly, everything works fine but its like not detecting the gpu, i even disabled the integrated gpu of my new board to see if it was blocking the my external gpu but it still now showing any signal

and i tested my gpu in an older board and its working


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#3
May 4, 2015 at 22:20:07
i mean... my gpu works but not in my new motherboard

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Related Solutions

#4
May 4, 2015 at 22:24:45
If you haven't yet tested the power supply in another working computer then you should do that. Again, you think the problem is with the gpu not with the PSU because you hear fans and drives spin up so you assume the computer is working. That's not necessarily so.

Verify the ram sticks are clean and firmly installed. Make sure the cpu has no bent pins and its heatsink if correctly installed. You should also temporarily disconnect all the drives, unnecessary add-on cards and any USB devices and see if it boots as a bare-bones system

Also the cpu may have been damaged from the outage.

message edited by DAVEINCAPS


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#5
May 4, 2015 at 22:36:11
yes i tested the power supply and it worked in a diferent pc, even using my gpu in that one

i cleaned the ram sticks already and nothing,

the cpu is ok, no bent spins i just checked it,
the heatsink is working and is correctly installed i asure that

and yes it boots are a bare-bones system after i disconnected all the drives

about the cpu damaged by the outage... i dont have a clue, cuz the motherboard that had both GPU working is using a diferent CPU...

idk how to test or know if its an internal CPU problem,

but i checked in task manager the cores usage history and they seems to be working, i see the signals, idk if that enough to know if its my CPU,
also, my computers doesnt have any delay on loading things, or starting windows so i dont know


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#6
May 5, 2015 at 10:31:10
Don't try booting into Windows. Do NOT even connect the hard drive or ANY drives. You should be able to boot into the BIOS screens (del at startup) using ONLY PSU, CPU, mother board, GPU (preferably intgrated), 1 stick of RAM, monitor, keyboard. IF the motherboard does NOT have a sound chip then connect a speaker.

NO other hardware connected.


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#7
May 5, 2015 at 19:01:52
Yeah, you indicate it's booting without additional hardware attached, if only to the logo or posting screen. That would mean the added hardware is the problem, either a bad piece or a problem connection.

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#8
May 5, 2015 at 20:05:08
✔ Best Answer
To restate:
New MB works with integrated graphics.
Power supply works on another machine, even with the same graphics card.
PC does not work with old or new motherboard with the combination of power supply and existing graphics card.
You did not reinstall Windows.

Try:
Flash BIOS with latest.
Reset BIOS to defaults, then manually set BIOS to best for primary hardware.
Make sure that you install all drivers for new motherboard, do it with onboard graphics and if necessary, do it in Safe Mode.
Try reseating graphics card a couple of times in case tarnish in socket.
Make sure PCIe power connector is attached, if more than one is available, try both one at a time.
Make sure that if there are more than one PCIe 16x connector, use the first one (top one) or see manual.
Make sure that all case posts are under correct spots on motherboard, all have screws, there are non under motherboard where there is no mounting hole, and there are no mounting holes without post under it.
In BIOS primary graphics is set to PCIe 16x slot or 'PCIe 16x if present' depending on options for your BIOS.

If any assumptions are incorrect, please let us know.
Post back all results. Remember, try one change and test so you know what works and don't have to back track and try a couple again in different combinations.

You have to be a little bit crazy to keep you from going insane.


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