Screen flashes then everything freezes gpu failure?

[Yosher]

Hello, for the past few weeks or so I've been having this problem where my screen would flash(turn on an off once) and then everything would freeze this would usually be followed by either the whole screen just freezing and I have to restart for it to work(it continues to flash for a few times till the screen becomes completely dark and nothing responds) or the computer restarts by itself instantly,this occured before booting into windows too and in safe mode so it's not a driver problem. I have so far reinstalled windows numerous times to no avail, but sometimes the pc would've worked just fine for days on end until I turned it off and then it would start again on next boot.

The gpu is not ancient but it is 2 years old while all the other components are less than 1 year old, I'm not sure if it's the cpu or could possibly be the cable or something (i use a dvi-d to vga converter) but I don't think a cable would cause the pc to restart, I'm a student so I don't have a ton of money and I just want to make sure that if I'm buying something It's going to be fixing it.

Specs:
Core i3 9100F
GT 1030
8GB crucial 2666mhz
512 gb ssd,350gb hdd(hdd isn't faulty)
Thanks for the help

 

[In2Photos]

Is there a specific task you're performing when this happens? Try reseating the memory and GPU in their respective slots. If it continues try a different slot for the GPU if you have one available. You could try running memtest86 on the RAM as well. It could also be a PSU problem.

 

[Yosher]

Hey, thanks a lot for your reply so I had previously done all the things you had said just today I changed memory slots and reseated the gpu, switched power cables but unfortunately I only have one pci-e x16 slot on my motherboard I remember doing a memory test just a few days ago and the memory was working well and this occurs randomly around 1 - 10 minutes(usually 30 seconds) after windows boots up or sometimes even while it is booting it may also occur when I'm browsing something or playing games

 

[hardcore_gamer29]

try clearing your CMOS to reset bios.
have you updated bios recently?
try onboard GPU once
is there any whinning or any other noise in PSU?
YOU NEED TO THINK OF THAT DVI CONNECTOR AGAIN can you use without it?