Question Omen 45L Monitor loses signal when launching games

[moejayy]

Product: OMEN by HP 45L Gaming Desktop PC GT22-0000a (4E977AV)
Operating System: Microsoft Windows 11
Product Number: 50J09EA#UUW

GPU: GeForce RTX 3070 8GB
CPU: Ryzen 5800X
PSU: 600W

I have had my Omen 45l 3070 for about a month and everything worked fine. But now, whenever I launch a game, a couple of seconds after its launch I will get blackscreen with "No display" on my monitor. The PC is still on, with lights on both keyboard and mouse, but when pressing caps lock on my keyboard the lights dont go on/off. I am forced to shut down the PC by holding down the power button, but sometimes it does it by itself. This also happens when I tried benchmarking. I can browse internet just fine.

I have tried:
-Reinstalling graphic drivers and the Bios is up to date.
-Uninstalling and reinstalling the graphic card, emptying the power then turning on again.
-Undervolting GPU

Can these crashes be consequences of a faulty GPU or my PSU?

 

[Lutfij]

Welcome to the forums, newcomer!

Uninstalling and reinstalling the graphic card, emptying the power then turning on again.
Can you please walk us through how you did this?

Well, from what you've provided the system with an RTX3070 should be powered with a reliably built, branded 750W PSU at the very least. A higher wattage would also mean more headroom, then again the GPU would also have transient load spikes meaning it would tax the PSU more.

Can you use HWMonitor to monitor your temps while idling at OS GUI and when you've launched the game?