System powers on, but no display

[cholben2]

Hi All! I have been having an issue where my computer will turn on, but not show any display. I did do some digging on the forums that helped me with some troubleshooting here but here is the current status.
-PC was build June 2020 (build to follow)
-April 2021 computer would not boot, powers on (RAM lights up to set RGB colors, but fans are back to factory RGB rainbow) but no display (multiple displays, multiple cables, displays and cables work with laptop)
-Messaged with some friends and thought it was a GPU issue - reached out and (luckily) had warranty still open. Sent it in, they tested it with no issues but still sent me a new one back
-Installed new GPU (same make/model) mid-May 2021 and computer fired right up, no issues and I was back to playing games as I was before.
-July 22 2021 - Exact same issue occurred. Tried resetting CMOS, tried 1 ram stick at a time, tried multiple cables and displays but nothing seems to be working. I have not heard any beeps, nor do I see any additional lights on the motherboard (that I can tell).

So im stuck, I dont know what to do next. im relatively new to working and troubleshooting these kinds of things, but I am willing to learn (even if it costs and I need to replace some things). Any feedback helps, and thanks in advance!

Build:
CPU - AMD Ryzen 7 3700x 3.6GHz 8core/16thread 65W processor
PS - 750W Thermaltake Toughpower Grand 80 Plus Gold Certified
GPU - AMD Radeon RX 5700 XT 8GB GDDR6 PCIe 4.0
Motherboard - ASUS Prime X570-P ATX
RAM - 32GB (8GBx4) DDR4/3200MHz Duel Channel Memory (Corsair Vengeance)
OS - Windows 10

Let me know any additional information I can provide!

-C

[Bruce]

with the problem re-appearing and trouble shooting potentially taking a while and involving many components, I’d be reassembling everything outside the case and on to a piece of cardboard on your floor or some table.
this will eliminate the case as a possible cause, let you inspect all the parts as you relocate them, check all the cables, clean out any dust, and get you acquainted with your rig.

since the Ryzen 7 has no integrated graphics, you can’t leave the Radeon out and plug your monitor into the mobo HDMI port, so first up you may want to chase someone who’ll let you borrow their GPU for testing purposes as this would be where i would start my investigations since you got two months of solid use the last time the GPU was changed.

[cholben2]

When you mention assembling outside of the case to factor that out the case as a cause, does that mean assembling and trying to run/boot outside of case? (this might factor in the assembly surfaces I use).

I was worried it could still be a GPU issue, it would be strange to me that the manufacturer tested my original GPU that I thought failed and they said it passed, but the new one plugged right in and had no issues for me. I will dig around and see if someone has a GPU I can borrow (or I can get a cheap backup just to test). Do you think there is any chance the PSU could be impacting this? if so I can look into borrowing or getting a backup PSU as well. I just dont know anyone local that has a custom PC, so might take me some time to find those contacts.

[Bruce]

while my money is on the GPU, it could just as easily be anything other component, hell, even just be time for a good clean.
yeah - once you have it reassembled on a piece of cardboard, booting it up is the next step in trouble shooting.
that is when you can start looking at individual components, cleaning then, swapping them etc.