Question DisplayPort only works in BIOS & Safe Mode, but no signal when booting Windows ?

Aug 22, 2023
System Unit spec
Mobo - GA-AB350M GAMING 3
GPU - RX 5500XT (1 x hdmi port, 3 x DP ports)
1st monitor - hdmi to hdmi connectivity tru gpu
2nd monitor - dp to hdmi adapter connectivity tru gpu

Before Clean Windows installation:
-My DisplayPort only gave display in Safe Mode & BIOS Setup.
-My HDMI works perfectly fine.

After Clean Windows installation, without updating drivers from windows and gpu's manufacturer.
-My DisplayPort shows display only at 1024 x 768 resolution.

But once either windows or gpu's drivers are installed:
-DisplayPort signal is lost on 2nd monitor, only HDMI picks up the signal from 1st monitor.
-It goes back to 2nd monitor, DP only receives signal in bios setup and safe mode.

Need help so badly, been 2 weeks trying to find solution to my problem.


Need help so badly, been 2 weeks trying to find solution to my problem.
Only fix: GPU replacement.

You could try all 3 DP ports your GPU has, but i doubt it makes a difference.

There is possible, 2nd solution as well, cheaper, IF you have patience to find the right product.
There are HDMI extended adapters out there, that take monitor video/audio signal from one source (e.g laptop USB port) and either duplicate or extend the signal to two (or more) monitors.

Here's video about it:


And the very same device shown on video at amazon,

Do note that the device shown in video has USB type-C or type-A input ports (since it is meant for laptops). What you'd need for your PC, is where input port is HDMI (so you can plug it to your GPU). I did look around a bit but all i could find with HDMI input port, are HDMI duplicators (mirror image) and not extended display. Now, if you want it cheaper, it's up to you to find the correct adapter with HDMI input port.


How come it was able to display on both monitors 2 months ago ?
Hardware can die at any given moment, often without an apparent reason. For that, we have hardware warranty. If no hardware ever dies, there wouldn't be a need for a warranty.

If your GPU has warranty, RMA it. Else-ways, either live with it or buy new GPU (or the adapter, which is workaround).
Btw, symptoms show driver chip on GPU being bad, namely the portion that handles DP port(s).

Oh, planned obsolescence is also a thing.