Cant turn on PS4. Safe Mode loop & shutdown

Hey there.

After a full system cleaning, my PS4 wont boot up after touching the power sensor. (First gen model)

But when I try to insert a disc, it turns on, beeps a 2nd time and goes into Safe Mode. (Ita like the button is held down)

If I choose one of the options, reboots, beeps a 2nd time again, Safe Mode, then beeps a 3rd time and shuts itself down.

The plastic cover and the metal that touches the gold power "switch" is in correct placement. Is this a motherboard issue?

(Sent in my system to a service for examining it)

Please help me, I would like to evade this problem in the future.