Computer randomly turns off

[Yous3f_M]

Hello i have a issue regarding my computer that i require help with the issue is that my computer randomly turns off when ever it feels like it and when it does turn off the RGB lights and fans are still running and also when it turns of the bois light turns on and is froze white i cannot restart it with the buttons on the case and it only restarts if i pull the plug out or turn of the Power supply this is happening in a loop and i haven't found what is causing this yet here are some images to what i mean it also has a tendency it randomly fix itself and sometimes when i start my pc its fixed but other times i get the issue.

 

here are my specs.

 

CPU RYZEN 5 2600

GPU GTX 1050TI ASUS STRIX

RAM HYPERX PREDETOR 16GB 3200 

PSU GENERIC 80PLUS 500W

HDD SEAGATE 1TB

SSD CRUCIAL 120GB

 

What i have tried

 

i have tried cleaning my pc because it was dusty i thought it was a overheating issue so i cleaned it out and that did not fix it i tried running it without the gpu installed that did not fix it and i have tried removing and reinstalling the cmos battery that also did not fix it i thought also that it might be a issue with the battery so i am going to go get a new one but for not those things that i did not fix the issue so my last venture before i take it to the repair shop is to come here and ask you good folks if you might have a idea why this is doing this.