Ps4 turns on using controller only, internal Peripherals won't work.

Hi All, i'm new and i am from Italy. I'm trying to fix my old ps4, a first gen model (chassis A). So, after thermal repaste my ps4 won't start up using capacitive lid sensor (power button) but sometimes i'm able to start it up using the controller ps button. Warranty is obviously voided and I don't want to pay 150$ to replace it because I've already bought the new 1Tb ps4 model. The strange thing is that every internal pheripheal (including capacitive buttons and optical drive) doesn't work. i think it's not a power supply issue... Software Maybe? it seems like the main motherboard runs on her own without communicating with others Hardware pieces! Do you think a Motherboard Reballing Could Help? Thank you!