Question PC not booting up

V Gaming

Honorable
Dec 25, 2016
43
3
10,535
So it happened yesterday.When i pressed power button ,the mobo showed orange led then red led and everything turned off except the ROG logo on mobo( it keeps glowing).All fans lights start and turn off within 2 seconds.This was happening from 2 months but after 3-4 tries,the pc usually booted up but today it didnt boot up not even once.Ive triee every basic troubleshooting steo from reseatting rams , tried 1 ram at a time , clear cmos, checked all psu connections to components , gpu reseated but nothing seems to work.Built this pc in january of this year.Everything is on stocked never touched bios or anything.Also Everything is new except i took case and PSU from old pc that is almost 4 yrs old.My question is that could it be dead psu ?
MY SPECS
Ryzen 2600
STRIX B450 f gaming
16gb trident z rgb 3000mhz
Corsair VS 650
GTX 1050ti