troubleshoot pc sometimes posts sometimes does not

[Jazz3456]

Ive had this machine for about 6 to 9 months.Recently it decides to sometimes boot and sometimes dont (in both cases fans are spinning).At first i thought it was a PSU problem but when i sent it for RMA ,the company said it was alright.After i got it back i plugged everything in properly and it booted at first into windows normally.Then i shut it down via the windows power off option and it didnt post.At the moment of writing this post the machine is up and running (im writing this with the problematic pc) but im too afraid to turn it back off so i think i should just let it on until a solution is found.I hope someone helps me with this issue because this is the first and only pc ive built

Specs:

• Ryzen 5 1600x (COOLER:Deepcool Gammaxx 200T)
•  ASRock AB350 Pro4
• Corsair Vengeance LPX 8GB DDR4-2400MHz (CMK8GX4M2A2400C14)
• GTX 1050
• Thermaltake Smart RGB 700W
• Cougar MX330-X 
• HDDs:WDC WD3200AAJS-56M0A0 and TOSHIBA DT01ACA100

[Jazz3456]

Just now, Jazz3456 said:

Ive had this machine for about 6 to 9 months.Recently it decides to sometimes boot and sometimes dont (in both cases fans are spinning).At first i thought it was a PSU problem but when i sent it for RMA ,the company said it was alright.After i got it back i plugged everything in properly and it booted at first into windows normally.Then i shut it down via the windows power off option and it didnt post.At the moment of writing this post the machine is up and running (im writing this with the problematic pc) but im too afraid to turn it back off so i think i should just let it on until a solution is found.

Specs:

• Ryzen 5 1600x (COOLER:Deepcool Gammaxx 200T)
•  ASRock AB350 Pro4
• Corsair Vengeance LPX 8GB DDR4-2400MHz (CMK8GX4M2A2400C14)
• GTX 1050
• Thermaltake Smart RGB 700W
• Cougar MX330-X 
• HDDs:WDC WD3200AAJS-56M0A0 and TOSHIBA DT01ACA100

and no the 6 to 9 months isnt a 69 joke