Hello everyone, I'm here to ask for some help.

I've had my PC gaming for about a year and a half without issues, but in the last few days I've had 3 sudden black screen / no signal crashes (twice today).

It happens even under light usage (watching Crunchyroll, browsing, etc.). The screen suddenly goes black and the monitor shows "No signal".

The only way to recover is forcing a shutdown and restarting the PC.

Specs:

• CPU: Intel i5-13600K
• GPU: AMD RX 7800 XT
• RAM: 32GB
• Monitor: (165Hz, AOC G2 Q24G2A/BK 23.8")

Connection:

• DisplayPort (also tried reconnecting, changing orientation, and different ports)
• Also tried connecting to motherboard output (no signal)

Things I've tried:

• Replugging DP cable
• Switching DP ports
• Rebooting system
• Force shutdown + restart (temporary fix)

Question:

What could be causing this and how can I troubleshoot it step by step? I'm not very experienced, so simple and detailed instructions would be appreciated.

Thanks in advance!