PS4 don't power on

hello

I had to sell my PS4 to a friend so last week I wiped it

after the factory reset it worked and started well

I turned it off properly via the menu and then repacked in the box

yesterday my friends takes the console unpacked to put it into use

the console does not light either by the button or by inserting a disc, no indicator lights but I have 3 beeps if I press the eject button indicating the absence of bluray in the player

I do not think it's a power problem given the eject button beeps

I wonder if it would not be the sensitive power button that would fail

Someone would have any idea?

if it is this button is it possible to have it as a spare part to change it?

thank you for responses