PC turns on But no display

[Torben Lund]

So I got myself a new deepcool 240ex rgb aio for christmas and installed it. When finished, I turned the PC on, and everything seems to be working.(all lights and fans on). But there is no display.

I know the monitor is working (even checked a different one to be sure). I’ve tried resetting the cmos, swapping psu, tried different ram configs, with and without storage, and I know all cables are connected and seated properly.

the Only thing I have left to do is try the old cooler. But I can’t do that for a couple of days because I don’t have thermal paste at the moement, though i have ordered. 

If there is anything that might fix the problem in the meantime, please let me know

 

asus prime x370-pro

ryzen 5 1600

sapphire RX 580 8gb

16gb corsair LED 3200mhz ram

rm750x psu

deepcool 240ex rgb aio

2tb hdd

240gb ssd

[NelizMastr]

You could try loosening the screws on the cooler just a little bit. Tightening too much can cause stress and boot failure.

[Torben Lund]

4 minutes ago, NelizMastr said:

You could try loosening the screws on the cooler just a little bit. Tightening too much can cause stress and boot failure.

Didn’t work

[TheWhitestGuy07]

Have you tried plugging in your monitor?

[TheWhitestGuy07]

I know it sounds far fetched but they tend to work a little bit better when they are receiving electricity from a wall outlet 

[Princess Luna]

Does the system turns on and Stays on or it shuts down on its own after a period of time?

[Torben Lund]

2 minutes ago, TheWhitestGuy07 said:

I know it sounds far fetched but they tend to work a little bit better when they are receiving electricity from a wall outlet 

Im looking for serious answers, so if you’re not here to help, i recommend you go somewhere else. Thank you

[johnukguy]

Do a cold boot, if you haven't already. Switch off the PSU at the back, unplug it, press the front power button to discharge any remaining current, wait a few seconds, plug back in the PSU, turn it on, press the front power button.

[Torben Lund]

Just now, Princess Cadence said:

Does the system turns on and Stays on or it shuts down on its own after a period of time?

It stays on until I force it off. 

[TheWhitestGuy07]

Hey I had to scour the internet high and low for that information you prick!

[Torben Lund]

1 minute ago, johnukguy said:

Do a cold boot, if you haven't already. Switch off the PSU at the back, unplug it, press the front power button to discharge any remaining current, wait a few seconds, plug back in the PSU, turn it on, press the front power button.

I have my PC outside the case on a testbench, can I do a cold boot still? never done one before

[Princess Luna]

Just now, Torben Lund said:

It stays on until I force it off. 

You can rule out issues with memory and motherboard then, the faulty hardware appears to be the video card, make sure the pci-e power is all the way in same for the header.

 

try a different cable too, if you have a secondary system or some friend with a PC that can help you out I'd try checking if the video card is working on it.

[johnukguy]

3 minutes ago, Torben Lund said:

I have my PC outside the case on a testbench, can I do a cold boot still? never done one before

Yes and do try a different cable as well, if you can, as Princess Cadence suggested.

[Torben Lund]

2 minutes ago, johnukguy said:

Yes and do try a different cable as well, if you can, as Princess Cadence suggested.

I’ll try a few different cables

[johnukguy]

If none of our suggestions work, I would suggest, once you have more thermal paste, that you try uninstalling and then reinstalling the new cpu cooler, before trying the old one, as something may have happened there that's affecting the boot and reinstalling it should sort that out.

[Torben Lund]

Not sure How Well you can see in the video, but it just stays on like that forever and it seems like its working. Tried a few different PCI-e cables with no success. 

53607381448__38231280-5590-40FE-B0D2-FA76CC9130F7.MOV

[Torben Lund]

6 minutes ago, johnukguy said:

If none of our suggestions work, I would suggest, once you have more thermal paste, that you try uninstalling and then reinstalling the new cpu cooler, before trying the old one, as something may have happened there that's affecting the boot and reinstalling it should sort that out.

When i removed the old cooler, i didn’t use isopropyl alcohol to remove the old thermal paste, just a coffee filter. Could that have an impact?

[johnukguy]

Unlikely that it was that, though I would recommend thoroughly cleaning the CPU/heatsink with something like alcohol first. This is a similar case as yours, albeit with an air cooler:

http://www.tomshardware.com/answers/id-1982151/installed-cpu-cooler-computer-turns-display.html