Sorry man, have you checked the power supply cable? Must be frustrating for you, these consoles are not cheap.
I hope you get it sorted, keep me updated man.
My ps4 never game me problems, my ps5 did though, and was totally dead, did the 15 to 20 second power press and hold, then a beep that was music to my ears, and it powered on.I have never put it in sleep mode since.
just sharing my experience.
Thats the problem, never leave it in sleep mode. Is there no way you can reset the ps5, try this press and hold
the Playstation console power button for 15 seconds.