Windows 10: PC keeps restarting randomly with no errors or a restart screen

My PC keeps rebooting with no blue screen or restart screen, This started happening a few days ago but before then it would power off and wont turn on again unless i leave it unplugged for a while then replug it, the led inside of the PC when it suddenly powers off also turns off maybe indicating that the pc is getting no power at all.Specificationsrocesser: AMD A6-5400B APU with Radeon HD Graphics8GB DDR3 RamGPU: AMD Radeon HD 7540DWindows 11 Pro

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Computer randomly has black screen and restarts

Taco this could be software also. Before you get all crazy, do as Erocker suggested. Find out the error in the Event Viewer. Look for the faulting module and the error code itself. Also check the reliability monitor. At the bottom it will have "View all Error Reports". Post a screen of whats in there if anything.

This could be a simple as a bad driver install.

ALSO have you downloaded or installed anything lately? STAY OUT OF THE DAMN BIOS UNTIL WE KNOW THE ERROR! lol. I know you. Baby steps boy, baby steps.

 

PC Randomly Restarting after installing new Ram!

Tried your suggestions, but still had a restart! Also ran memtest overnight (13 hours according to memtest) and had no errors! Also ran Passmark Burn in test for a couple hours testing everything and had no errors or restart. Could fitting the new ram have triggered something to go bad like my mobo or psu?

 

PC Restarting

ok one of my other pc's keeps restarting randomly theres nothing in error report and the blue screen doesnt stay on long enough. anyone have any ideas on what it might be it does it during games and just normal use.

Specs.
AMD Athlon 64 3200 socket 939
Gigabyte Mobo Ge-Force 6100 chipset
Saphire ATI Radeon x1300 256
2 Ghz Kingsten Ram
550 Watt PSU
160 gig sata drive