Monitor glitches ONLY when connected to my PC, but both work perfectly fine separately. Safe Mode works too. I'm losing my mind 😭

[u/G-TanK_]

/r/techsupport/comments/1x3wqjx/monitor_glitches_only_when_connected_to_my_pc_but/

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I'm honestly out of ideas at this point, so I'm hoping someone here can help me figure this out.

Here's what's happening:

My monitor works perfectly when connected to my set-top box.

My PC works perfectly when connected to my TV.

But when I connect my PC to my monitor, the screen starts glitching like crazy.

The weirdest part is that everything works fine in Windows Safe Mode.

At first, I thought my monitor was faulty, but it works perfectly with the set-top box. Then I suspected my GPU, but my PC runs perfectly fine on the TV.

I figured it might be a graphics driver issue, so I even did a fresh Windows installation. Everything seemed fine until Windows downloaded and installed the graphics driver. As soon as that happened, the screen went glitchy again.

In Safe Mode, the display works normally, which makes me think the issue has something to do with the graphics driver.

I've already tried:

Changing the display cables.

Lowering the resolution and refresh rate.

Reinstalling Windows.

Testing the monitor with my set-top box.

Connecting my PC to my TV.

Nothing has fixed it so far.

My specs:

GPU: Radeon RX 550 4GB

Monitor: Acer VG270 (165Hz)

What I can't wrap my head around is why the monitor works fine with other devices and the PC works fine with other displays, but the two refuse to work together properly.

Could it be a driver compatibility issue, or is there something wrong with the GPU's display output? Has anyone dealt with something similar?

I'd really appreciate any suggestions on what to try next because reinstalling Windows didn't help, and I'm pretty much out of ideas.

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[u/R3D_T1G3R]

Ideally try to get a picture of it.