Answer to "PS4 won't turn on (No light or Beep)"I had the same problem. It can be 3 Things !!! 1 = POWER SUPPLY ( Look on You Tube how to Identify this one. ) 2 = APU Not Seated Properly. ( Send it in for Repairs or get a new one BAD LUCK - THANKS SONY !! ) 3 = Full off Dust and overheating. ) Mine was No 3 !!! Took off covers. Pulled out Hard Drive and Power Supply. Took it in to work and Blew all the $@$* out of the PSU and Fans and Heat Sink. ( WAS REALLY DUSTY. ) Put it back together and worked fine ever since. May not be the answer to all the problems but this helped mine. PS... KEEP IT CLEAN !!!. ) HOPE THIS HELPS SOME OF YOU GUYS OUT !!!!!