One day my Playstation 4 stopped working for no reason. There was a blue flashing light and it wasn't connecting to my TV. I tried many different things such as new HDMI cables, unplugging the console and turning it back on, I almost even tried the old towel trick for xbox 360. In the end I found that this method worked best for me. I hope it works for you guys too.

** TRY USING A HAIRDRYER TO BLOW THE DUST OUT OF THE MACHINE IF THIS METHOD DOES NOT WORK ***

P.S. I cannot promise that this will work, but if it helps even 1 person, that would be great :). Oh and the Playstation wasn't kept on the carpet all of the time haha.