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No video output, graphics card not detected

S

SHuZO181

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Jun 27, 2019
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Around two weeks ago I shut my pc off by unplugging it from the wall. The next day when I tried to turn it on my hd7770 did not display anything. When i plugged my monitor into the motherboard i got a popup about some kind of overclocking error. My FX6300 was overclocked using this guide and for few months it run stable. I restored original BIOS settings and booted into windows. When i checked in the device menager the graphics card wasn't detected. I cleaned both te PCI-E slot and the card but nothing changed. I thought that my hd7770 died but today when i instaled a r9 270x same problems accured. Since then i tried changing the PSU and the motherboard with no effect. The fans spin and the power LED on the card lights up.
My full specs:
-Gigabyte 78LMT-USB3
-AMD FX6300
-Asus HD7770 1gb
-Coolermaster 500w psu
And the parts i used in testing
-ASRock 985GM-GS3 FX
-Logic500
-MSI R9 270X 2gb
 
Have you tried a different pci slot for the gpu? If the gpu's have a power connecter have you tried a different rail/cable to power them up? Just pulling the plug out of wall may have damaged something in PSU or on mobo.
 
both mobos have only one pci slot and i tried all 6pin connectors. I'm worried something happened to the cpu
 
try a different psu or use a 6 pin adapter and use the molex connectors. I doubt it is the cpu, others here may chime in different. I think it is either the psu or mobo.
 
as I said, I tried 2 different motherboards and a spare psu. I haven't tested the cards in any other system but I'm pretty sure both work fine.
 
How do you know if they 'work fine' if you havent tested them? Thats like saying i can see without eyes.
 
All 8gigs are detected

FreedomEclipse said:
How do you know if they 'work fine' if you havent tested them? Thats like saying i can see without eyes.
Click to expand...
Both cards have exactly the same problems. One started acting up two weeks ago. The second one i just bought. It seems a little odd that a card i just bought acts exactly same as the one i used earlier. I'm pretty sure cards aren't the problem
 
It could be the power supply that has damaged both cards.

When you changed the PSU what did you change it too? It might be worth ordering a new GPU and powersupply from a reputable brand and wait for them to all arrive before swapping everything out and putting all the new stuff in all in one go just so its all fresh.

Rather expensive way to do it but at least it narrows down what could be wrong.
 
First i used a coolermaster psu and then i tried a logic500 unit that i had lying on my shelf from my older pc. I'll try to test the cards in my friends pc to know for sure.
 
just a thought, check what video output settings are in Bios pls.
 
that logic 500 is 500w for £24. its not worth the metal its made out of. It probably pulls 300w or just under 300w at a stretch.

if you value your hardware, you gotta invest in a good powersupply to keep it all going smoothly. Electricity doesnt care what it damages and if a power supply cant keep it regulated. then dont be surprised when your PC no longer wishes to boot up when you push the button.

Only a fool would buy power supplies like that logic 500.
 
I bought this pc as a prebuild and upgraded that psu to coolermaster unit. I know this psu is terrible and it sat in a box for around a year. I only used it for a test. It couldn't even power the gigabyte board because of its 4pin cpu connector. When i lost video output my pc was powered by the coolermaster psu.
Here's a picture (sorry for terrible lighting but my flash refuses to work)
 

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That cooler Master power supply is junk. The good thing is that its made by CWT and they make a lot of the low and mid and mid/high range powersupplies for Corsair.

That particular powersupply is only good for 400w though - thats not surprising as power supply manufacturers always exaggerate the numbers. Throw it in the trash.

Its not quite scraping the barrel in terms of quality for Cooler master but its close. I would replace that power supply - get a seasonic, FSP, Enermax or Corsair but you want at least a TX series at the minimum.
 
My budget is very limited and i bought the best thing i had money for. I was planning to get a better psu for some time. For now i feel more comfortable using this psu over that logic pile of shit
 
Lets put into context what his "junk" power supply is running

-Gigabyte 78LMT-USB3
-AMD FX6300
-Asus HD7770 1gb

While its not a good PSU its perfectly fine for the hardware.

I would buy a cheap multi-meter and check the 12v rail of whatever Power supply you initially had hooked up to BOTH GPUS before hooking another GPU up to it though. Im going with both GPUs are dead, especially if your PC is running fine with on board HDMI. Its not unusual for a GPU to light up and fans to spin even when its dead.
 
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advanced3 said:
Lets put into context what his "junk" power supply is running

-Gigabyte 78LMT-USB3
-AMD FX6300
-Asus HD7770 1gb

While its not a good PSU its perfectly fine for the hardware.

I would buy a cheap multi-meter and check the 12v rail of whatever Power supply you initially had hooked up to BOTH GPUS before hooking another GPU up to it though. Im going with both GPUs are dead, especially if your PC is running fine with on board HDMI. Its not unusual for a GPU to light up and fans to spin even when its dead.
Click to expand...


Yeah, it totally wasn't a 'junk psu' that killed those graphics cards. Junk is still junk even if you hook up an arm setup to it
 
I dont know how much You paid but,
You can get EVGA psu for $50 with 80 plus bronze efficiency rating.
I couldnt really find that cooler master thunder 500W but I doubt it would be much cheaper than that(maybe $10 tops).
Now, there is a chance You have two damaged graphic cards and a janky psu.
Grand total much higher than 50 bucks...

btw:
advanced3 said:
While its not a good PSU its perfectly fine for the hardware.
Click to expand...
FXs tend to be quite power hungry.
 
I used to get this problem on my old 790FX mobo and the only way to get the GPU to show a pic was remove the card and start the PC without the GPU turn off the PC again and reinstall the GPU and all was good again
 
If you're using a crt based monitor, yanking the plug could have discharged it thru your video card, if anything else was grounded.

I've killed a card that way, and an ethernet hub. :)
 
Lorec said:
I dont know how much You paid but,
You can get EVGA psu for $50 with 80 plus bronze efficiency rating.
I couldnt really find that cooler master thunder 500W but I doubt it would be much cheaper than that(maybe $10 tops).
Now, there is a chance You have two damaged graphic cards and a janky psu.
Grand total much higher than 50 bucks...

btw:

FXs tend to be quite power hungry.
Click to expand...
When i got this pc its original mobo was pretty shitty. The mosfets were overheating and the cpu fan would be at 100% all the time because of that. I spent most of my cash ob that giagbyte mobo and a better cpu cooler. For that coolermaster psu i paid about 12$ and i decided that it's better than the other piece of junk that was there when i bought the pc. I wanted to upgrade the psu sometime in the summer.
 
SHuZO181 said:
When i got this pc its original mobo was pretty shitty. The mosfets were overheating and the cpu fan would be at 100% all the time because of that. I spent most of my cash ob that giagbyte mobo and a better cpu cooler. For that coolermaster psu i paid about 12$ and i decided that it's better than the other piece of junk that was there when i bought the pc. I wanted to upgrade the psu sometime in the summer.
Click to expand...
well, we all make mistakes. 3 years ago when I built my fx system I did buy decent PSU but I cheaped out on mobo.
It went smokin' and took cpu with it.
Thank goodness i managed to RMA it saying that my apartment's air con is broken... lol
 
Well idk if it's related to the problem but yesterday i got a KERNEL SECURITY CHECK FAILURE blue screen. I run the sfc/scannow comand in the cmd and nothing was detected. Also i noticed my usb ports are acting weird. Every time i plug something in my keyboard shuts off and i have to plug it into another usb port.
 
Sounds like your board is dying - this can be due to one of three things....

1. Motherboard age - old motherboards, aging capacitors, or the lead soldering cracking or no longer making contact with the needed contact points
2. bad power supply which fried the motherboard, Power supply fired too much voltage into the board which partially or completely fried it.
3. Somewhere the board has become earthed with the case which breaks the connection - This is highly unlikely as usually earthed motherboards just dont power on at all when you push the button but its still a possible cause.

What i suggest is you strip everything out of the case and do a visual inspection before doing a 'dry run' of the system built outside of the case. like a test bench. place the motherboard ontop a cardboard box, your local phonebook, a block of wood or whatever - so long as it not electrically conductive and use a screwdriver or something to trip out the motherboard pins to get it started up.

If it still has the BSOD errors then your board is toast and no matter how many times you swap out the powersupply and graphics cards for newer and expensive ones - Neither of those will help
 
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