PS4 CUH-1115A completely unresponsive

Found a PS4 CUH-1115A for parts, listed issue no power. checked the power supply, it’s good, and with with my multi-meter I have confirmed 5v and 12v power delivery all over random areas of the bored but the system still shows zero signs of life. At this point without a full schematic of the bored I feel this system is beyond my ability to repair but I am interested to know what the possible fail points may be to cause such an issue on this board. would anyone here have any ideas?