No signal from motherboard or Gpu when Gpu contected.

[agn0stix12]

I have just finished building a system and all went okay; posted fine. So i got my GPU and seated it then contected the 6 pin power connector.

Now when i turn the system on I get no signal. Whether plugged into the Gpu or onboard graphics. I have changed the bios settings so as to have on board graphics output even while a pcie graphics card is installed. Remove the card and the system posts fine, again.

There is no beep code whatsoever when everythng is contected as it should be. I cant access the bios with the GPU contected as it give no signal from all motherboard and GPU connectors.

Also, i know beep codes are working as they should be because if i turn onboard off entirely and leave the GPU out, i get the relevant beeps.
No beeps when the card is fully contected (Power and pcie) and onboard off, which is really confusing me.

Card is a Gigabyte R9 380x 4GB

Any help would be great appreciated, ripping my hair out here; its a budget build for one of my kids.

 

[jay32267]

I would try the card in another machine.

 

[agn0stix12]

The 1060 from my machine works fine, sorry forgot to mention that.

 

[mickel454]

Ok! If you really want to fix your problem you should try this
#1) check GPU is on right place and all the connection are connected,while check that six pin connector is that giving right power?
2)is your GPU is old?
If so you have to clean GPU teeth with pencils eraser (that will shine like new gold) and remove that heat shrink from GPU and heat it with hot air gun *dont do extremely
Then fix it again test it


BEST OF LUCK

 

[jay32267]

I think this further supports the idea of trying the R9 in another machine.

 

[agn0stix12]

Sorry i read your reply backwards (try another card in this machine). I tried it in thr one the 1060 came from and it was fine. The card came as refurbished, but yes. I will clean the connectors next, what is heating it going to do? Incsse any joints have de-soldered? My Psu have 4 6 pin connectors and i have tried each and it can give twice the wattage needed and the ampage is considerably higher than needed too.

 

[jay32267]

I don't think cleaning the connectors is going to get you anything being that it works in another machine.

....and I realize that your PSU is supposed to have plenty of power.

Although....the symptoms you are having could be the result of low voltage when the card is plugged in.

I would be checking the voltages on the PSU with the card plugged in and the PC on.

The 3.3, 5 and 12V rails should be within +/-5% and the -12V should be +/- 10%.

 

[agn0stix12]

Both systems use the same PSU. 700w Kolink (585w from 12v rails and 48.75a), also, the pc went to a repair shop two weeks ago as it would not post at all (turns out the mainboard was broke) and he tested all the componants to figure out thr issue

 

[jay32267]

I understand.

I would still check them because you could have low voltage on one of the rails due to the card pulling it down....which if the card wasn't in the machine at the time it was in the shop....he would not have caught.

Also, the PSU could have deteriorated since the visit to the shop.

Also, checking the voltages isn't that hard and it's free.

You can google how to do it online and all you need is a 10$ voltmeter.

 

[agn0stix12]

I am sure i can borrow one from work and i know you to use it. Ill try and get a hold of one in the morning

 

[agn0stix12]

And no, the Gpu was not in the computer when it went to the show

 

[agn0stix12]

Turned out to be the motherboard, so i replaced it and got it to post... For one day, then. Back to the same issue again. Psu tested correct with vvoltmeter by the way (as did everything else). Something has to be causing this issue. Two motherboards with the same undiagnosable issue in a row!? Hmmm...