Question Help please

[Lightmimic]

Okay I built a computer awhile ago about January it worked with zero problens for a long time till about a week about till now theres random times when my computer will boot and be fine and other times when it will not boot and will just have a white led on my motherboard which in the manual say is a VGA error but that cant be true because sometimes it still boots im really confused on what the issue is i brought it to a pc repair shop and they had no clue

Cpu- r7 1700x (so no onboard video)
Gpu- rx 470 msi gaming edition
Mobo- strix b450-f gaming from RoG
Ram is just 16gb of ddr4 3000mhz
Psu- evga 750 watt

No one i know of has any clue including that repair shop so any help would be so thanked, please

 

[Barty1884]

Have you reseated the GPU? Could just be that it's slightly loose, and from time to time, isn't making a proper connection in the slot.

Realistically though, a "repair shop" should've stripped that system down and rebuilt/swapped components to test.

 

[Lightmimic]

Have you reseated the GPU? Could just be that it's slightly loose, and from time to time, isn't making a proper connection in the slot.

Realistically though, a "repair shop" should've stripped that system down and rebuilt/swapped components to test.

Yeah I've been trying anything I could think of to fix it, ive reseated the gpu, ram, and cpu multiple times in a desperate attempt to get it to work at the times it randomly doesnt.

 

[Lightmimic]

The biggest things ive tried is moving my ram to the secondary slota and that worked once then the same issue again so i put them back then once i quickly flipped the power switch on my psu off then back on and that also worked once then just back to the same issue if that helps anyone understand anything