"Did you put your pc together on your own or is it buyed?"
If everything is plugged in correctly, then you could try to clear the CMOS battery on your motherboard. What Motherboard do you have?
@Nemesia My monitor's plugged into the GPU, and nothing's still showing on the monitor.
@Leridan: Mobo: ASROCK B450M PRO (AMD)
4-5 days ago i had the same problem. Let me say what fixed it for me. Clearing the CMOS or doing it like me just reflashing bios what as well resets everything.
Yesterday i had this case as well, because i was changing something in my setup.
I just did the same thing as before right of the bat. Cleared CMOS and voilá the display was posting again some image.
Took me 5 minutes.
Before i was tinkering for 2 days before finally finding the answer.
To clear the CMOS of your ASROCK B450M Pro:
"
To clear CMOS:
- set your PSU switch on 0
- Hold the power button from your pc about 10 to 20 seconds clicked till you see no more lights turned on, at your motherboard.
- unplug the power cord from the wall
- plan A - use a jumper, screwdriver (or a coin, or paperclip, etc.) and short the 2 pins as described in the manual; keep it for 10 sec.
- plan B - with the power cord still unplugged, remove the button (coin) battery; press the power ON button on the PC; hold the power button for 10 sec; release and put back the battery;
"
Some Motherboards need Plan A and Plan B used together to clear the CMOS completely.
And as written before seomtimes it is faster just reflashing your BIOS if your motherboard does support BIOS flashing directly from USB without being able to post a picture.
That should be written in the manual as well.
Link to manual:
ASROCK B450M Pro MANUAL