Hello, I have my friend’s PS4 Pro. I went to his house because he needed it cleaned. It was caked full of stuff and I cleaned it all. I put it back together and Plugged in the power cable. I clicked the power button and it beeped and the blue bar turned on. I heard the fan spin for 2 seconds then it beeped 3 times and blue light slowly went out. I tried just pressing the eject button and it beeps but does nothing. I tried clicking the power button again and it just beeped and did nothing. I took it all apart again and put it back together and still nothing. Any Answers will be appreciated. Thanks! -Crykar