PC rapidly turning off and on

My PC has been having strange power issues lately and now it will not boot up at all.
Before, my computer would randomly shut down while I was using it but it would boot afterwards.
Now whenever I try to turn it on, it enters a boot loop state where it rapidly turns on nd then off again with less than a second between each state. This goes on forever until I pull the plug out of turn off the phone power supply.

Any help you have would be much appreciated, thank you!


TL;DR
PC was shutting down randomly while I am using it.
Now it does not boot and as soon as I turn it on, it begins to rapidly power on and off with less than a second intervals.

What I have tried:
Removing GPU
Changing Power supply
Changing ram
Removing ram completely (Same boot loop problem)
Removing boot drive (M.2 SSD)

--
PC SPECS:
Mobo: Prime B350M-A
CPU: Ryzen 5 1600
GPU: GTX 1060 3Gb
PSU: Corsair TX550M
RAM: Corsair Vengeance 16GB 3200Mhz

 

hi.
the problem is sure with the power switch or the reset switch.
try the following.
remove the connection of the reset switch and then power the pc on.
if it powers on then fantastic.
if its in a bootloop then.
remove the connection of the power switch and connect the reset switch in the place of the power switch and then start the pc.
1 of the 2 should work.

 

Thank you for the advice. I tried both solutions you gave but sadly neither worked
Both of them resulted in the same bootloop

 

ok.
now things start to get a little serious.
remove the heat sink from the cpu and clean the thermal paste from cpu and heatsink and repply and remount the heatsink.
or if this is a custem built pc check if there no case straps ground against the motherboard.

 

Sorry but what do you mean by "Case straps ground against the motherboard?"
I don't think I have any thermal paste on me so I'll try reapply it when I get a chance to buy some

 

ok dont reapply thermal paste just remove the heatsink and re fix it.
regarding grounding straps.
on some case there are mettle covers that block port holes and bend when installing the board.
just check if all of your ports can be accessed easily.
did the pc work before what caused this to happen

 

Alright, I'll try that soon. I am unsure of what caused this to happen as it happened quite suddenly.
I had noticed a few power issues here and there before such as putting my PC to sleep but when I turned it on the next day, it has shut down instead. I didn't think much of it and ignored it. Then my computer began to shut down suddenly but still booted and then when I turned it off, it began bootlooping like now.

 

I

Just reapplied the CPU, didn't make a difference sadly.

 

just start your pc and try resetting the bios to defaults.
if there is anything wrong in the settings that should fix it.
also try clearing cmos.

 

I reset my bios settings before the bootlooping happened. I just reset my CMOS and it didn't fix it either :/

 

Regarding your first question, the TX power supply is the original power supply I was using with this build. I also tested with another power supply (I can't remember what model it is but I'll check when I'm home) but that didn't work either.

I have also done all of the above steps you listed and I reapplied thermal paste as I found some that I had. From testing the parts individually, it seems the issue is the mobo or the CPU as it wont POST even with just the power supply and the CPU connected (no RAM or GPU or even boot drive).

 

have you reinstalled the cpu?
although it doesnt make any difference but if you have come this far there is no harm trying.
if you have not reinstalled the cpu and you have thermal compound in stock just remove the cpu and try booting without it.
on most motherboard you should get some beeps or some error that cpu is not properly installed also check for motherboard for any bulged caps if reinstalling cpu doesnt work then its time to rma the motherboard hope you have the plastic cover that covers the cpu pins.

 

I tried reinstalling the CPU with new thermal paste and it didn't work. However, I tried using a new motherboard and it stopped the bootlooping! But I am unable to get it to post and I am unsure of the reason why

 

ok.
this is the last thing that comes to my mind if this doesnt work then some1 may have to help in this forum.
disconnect any front cables like usb, audio, leds and others just keep the power button connected and try booting.
try with the old board first.
if this also doesnt work then 1 last final step.
this is a bit risky step and you will need a box the size of the motherboard.
just take your motherboard out of the case without the io plate
keep the motherboard on a box and only connect the power cable for the board and cpu power cable.
thats it no other cables and try booting.
if it posts then try connecting the hard drive and follow the step.
connect 1 device at a time so that you can know what you connected that stopped it from working.
also put 1 stick of ram at a time.
do not keep the board on a mettle or any other surface only a cardboard box or a motherboard box as there is a risk of shorting the board