Annoying crashing issue

[StarTreker1]

Hi, 

for the past year and a half I have been plagued by a crashing issue with my desktop. I’ve tried contacting support before and did the stuff recommended nothing worked. This is a hardware issue. It seems to crash when I run certain games. The games that cause this aren’t intense. If it’s a steam game it always crashes but usually a bit after  I close the game. The pc display goes black and the pc fans ramp up and is unresponsive. I cannot use this pc with the issue. 

this pc is no longer under warranty. However I contacted support when it was under warranty. I have had this issue since getting the pc. As I said nothing has fixed it. It seems to be a gpu issue possibly. I cannot afford to replace this gpu- and sadly the warranty is expired as said. 
(Honestly if this is a defect of any sort would that fall under the warranty? Since this issue arose during the period where I had the warranty?) 

[Prométhée]

hi

Sorry, but no, if the computer is no longer guaranteed, it's too late
Your only chance would be if you live in Europe..

OMEN 30L GT13-0024 Desktop PC Product Specifications

if this one

Operating System

Microsoft Windows 10 Home (64-bit)

did you mention windows 11?
was it better with windows 10, same thing?
I ask, because there are problems reported several times under windows 11 with certain games

this system cannot be used without a graphics card, so it is impossible to test without!