[SOLVED] Computer will not start without a specific graphics card

[EpicEthan]

Hi, I would just like to say that this problem seems to be more difficult than it might initially seems and I suspect maybe there might be two problems. So I'll start off with a more in-depth description of the problem.

The broken system: FX 6300, r9 270x
The new build: i5 9400f, gtx 1660ti
Spare graphics card: Assumed r7 240 pulled out of old dell pc

NOTE: New build parts know good. FX 6300 and i5 9400f have no integrated graphics.

So about a year or two ago I gave my old pc to my brother when I bought a new one. This pc worked fine until one day there was no display output. I swapped the spare graphics in, no pcie power needed graphics card, and it worked fine. I tested the r9 270x in my new build and it seemed to work fine booted to windows and appeared in device manager. So I assumed l, as you all probably would, that this was a psu problem however I rigged up my new build psu to the broken computer with the r9 270x and still no output. I put the 1660ti in and still no input. So now i just have no idea what to think and was hoping for some suggestions. Thanks.

 

[rgd1101]

make and model of the psu?

 

[EpicEthan]

make and model of the psu?

Old: Corsair CX500M
New: Corsair TX550M

 

[Danra]

Turn the broken computer off, turn the power supply off at the rear of the computer, leave the PSU cable to the wall connected so you have a ground. Ground yourself to the case to discharge ESD. Remove and install the video card into the slot at least 3 to 5 times, this will remove oxidation or metal migration. If that does not solve the problem I suspect the PCIe slot is bad.

There are chemicals that clean garbage caused by time off of computer parts, and sometimes a good cleaning is all components need to bring them back to life. you should be able to find YouTube articles on how to do this if you are interested.