NVIDIA graphics cards don't work

Hello,

I purchased a PC from a store called Standard computers years ago, it had 16 gig of ram with a NVIDIA Quadro and a NVIDIA GeoForce graphics card including the ASROCK motherboard.

A couple of months ago, all of a sudden the computer just wouldn't power on. With the help of telecoil, I found that there was something wrong with the power so we replaced the power source connected in the PC itself but that didn't work, it was the motherboard that was broken.

So we replaced that with an ASUS motherboard that is compatible with with the hardware we have, it'll power up and work like a normal computer but for some reason, when I put the two graphics cards back in, they just won't work.

What can I do to get them working again?

Thanks.

 

Sorry for the late reply, here are the computer specifications:

6 GIG of RAM
250GIG on master drive
1TB on slave drive
NVIDIA Geforce GT 610 graphics card
NVIDIA Quadro K620
DiskSoft Virtual SCSI ScRom Device
PIONEER BD-RW BDR-209D
Intel(R) 9 Series Chipset Family SATA AHCI Controller
Intel (R) Core ™ i5-4690 CPU @ 3.50GHz
Acer X193W (Digital) Monitor
Manufacturer: Standard Computers

 

It has 16 gig of ram, sorry.
The PC came pre made with the video cards and everything installed. The motherboard has it's own htmi input so it can work without the video cards.

The motherboard was previously broken so it was replaced with an ASUS motherboard similar to the original, to do that, I took out the video cards, intel processor, fans, and ram into the new one to properly configure the new motherboard without the video cards. After that when the PC was restored with everything okay, I put the video cards back in.
What puzzles me now is that when I put the cards back, it doesn't show any video, they don't seem to work if I use them as a video output.

 

I got the original hard drive and put it in the new motherboard. No clean install.

 

Could you explain how that works? Why would that create problems? Plus, that's terrible, why go through a clean install? I got my windows 10 for free through Microsoft, I can't obtain it again, I only have my original Windows 8.1 disk with it's serial key.

I did this with a family member who is an expert with IT, he made his own computer and did the exact same thing, take his old hard drive from his old computer and put it in his new one with the same graphics cards - no problems.

 

All right, thank you very much for your help. I will do that. I will come back if anything comes up and or the cards still don't work.

 

In the BIOS, set graphics from iGPU to PCIe. Power down the computer, remove DVI/HDMI or VGA cable from integrated graphics and connect it to the dedicated video card. Power on the computer. If you don't see the video, do the following steps.

Remove the Quadro card and use GeForce for video. Does it work?

Remove the GeForce card and use Quadro for video. Does it work?

You can get Windows 10 for free and install it. In order to use it past 30 days, you will have to buy a copy of Windows 10. Microsoft provides Windows 10 as a download which will give you a serial key (of course after buying it) or you can go through the Windows store within Windows to buy the CD key or serial key.

crjdriver, your guide is questionable. If there is no visual, I would take all add-on cards out and power up the computer, but only if the computer has onboard graphics. Also, I would have check if there any settings in the BIOS/UEFI that is related to graphics and change those settings if they are not on AUTO. Troubleshooting computers require a flow chart. OP did post all the hardware for me to diagnose the problem.

 

I have an ASUS motherboard and it didn't automatically switch to the dedicated video card when I mounted it. I had to change an option in the BIOS/UEFI that is related to graphics from iGPU to PCIe. There is no AUTO option. The motherboard model is P8H77-I from ASUS. I also have ASUS B75M-PLUS and the options is the same, so I used what I know for the OP problem. I didn't need to know the model of the motherboard and RAM that you ask. Over years of using my ASUS P8H77-I, I have memorized the BIOS options.

Carey Holzman's videos do show how to download Microsoft Windows 10 from Microsoft and install it. Microsoft freely provides a free download of Windows 10 that you can install. Microsoft does require that the user pays for a license if the user wants to continue using Windows 10 after 30 days. This can be done through Windows store within Windows 10 or buy a download version of Windows 10 through a reputable retailer. Of course, the Windows 10 version that you are buying through the retailer has to be the same as the one you installed.