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Graphics card No Signal - Asus Nvdia GTX 750Ti - Help !

by museuk2k / February 23, 2015 5:31 AM PST

Hi Guys

Normally I tend to spend alot of time and figure out these things on my own, But this has baffled me as to why my graphics wont work. My Current Build :

Case: Thermaltake Core V21
CPU: 3.40 gigahertz Intel Sandybridge i7-2600K Unlocked Core i7 Quad-Core Processor Socket 1155
GPU: Asus Nvidia GeForce GTX 750 Ti Graphics Card
Mobo: ASRock B75 Pro3-M
Ram: Corsair CMZ16GX3M4A1600C9 Vengeance 16GB (4x4GB) DDR3 1600 Mhz
And 2 Hard drives (cannot remember spec)
Windows 7 64 bit
Hanns.G Hi221 [Monitor]

Ok I know alot of the parts are old nowadays but it still is or was a really nice system running !

So Previously this system built was in another old Case but INSTEAD with Mobo H77 Asrock/ Nvdia GTS 260. It Ran fine for a good few years , then my display output started playing up one day, so as I just assumed it was the Graphics card, I simply bought the 750 TI last year & replaced it , it seemed to work perfectly fine after. Please note the 750 TI was connected to the monitor via VGA, not DVI through an Adapter like the GTS 260.

Situation now :
Now a few months later, and something similar seemed to happen where It just failed on me again but this time with the new GTX 750 Ti. I also had various times where the power would just cut off , which was really weird .

As the case was old I thought maybe there was alot of dust or something was shorting with the mobo & failing to give power . As I had a new PSU and a not so old Mobo, I tried getting a new case .
And Again Graphics card not working,

If I connect the graphics card with power , the green light is on & the fans are working , so i know it is on. But the monitor will not show any signal.
I tried with it still connected but instead the monitor connected to the onboard graphics & again no signal.
It is only when I disconnected power from the GTX card that I get signal from the onboard graphics.
I thought maybe it could be the monitor itself , but that works perfectly fine with the onboard graphics.

So in conclusion Ive tried a new Mobo, New Case , ive tried a different power supply.
Ive tried the Old GTS 260, as well as an old back up PCIexpress graphics card.
Ive tried connecting the Graphics card via HDMI to a TV as a different source of output.
Ive tried this program called DDU to clear all drivers & reinstall Nvdia latest.

As the GTX 750 TI is only 7 months old & hardly used when purchased , I would like to think that it isnt the problem, but im not totally sure.

Only thing left I might try is to reinstall Windows , but I thought Id ask you guys first if you had a solution .

Very much appreciate any help !


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Clarification Request
Did you try without the 750?
by R. Proffitt Forum moderator / February 23, 2015 5:41 AM PST

That i7 should have onboard graphics so I start with that as a test.

All Answers

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Re: signal
by Kees_B Forum moderator / February 23, 2015 5:40 AM PST

Usually, the BIOS automatically turns of the onboard graphics if it determines a graphic card is installed. So that fits with your story.

If you don't see the usual BIOS messages on the monitor when booting, and also any bootable CD or DVD (like your Windows setup disk or a Linux Live disk) doesn't show anything, you made sure that it isn't a Windows issue and there is no need at all to reinstall Windows. Then you know for sure it's a hardware issue. That's an easy test, isn't it?


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No signal
by museuk2k / February 23, 2015 7:49 PM PST
In reply to: Re: signal


You are correct about the BIOS, So I tried booting from a USB with bootable Windows on it & still no signal.
I also had a new DVI to DVI cable delivered today just to see if it was that either but nope !

So are you saying if the Boot Windows wont display then its definetly the Graphics card ?
I dont understand how it could be faulty though , I literally only had it since last August, and even then I hadnt setup my desktop with it until December just gone , I didnt even use it!

Thanks for the input guys


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