ps3 power on without touch pad pcb

[truemaster]

hello i found in an electronick shop basement a CECHExx ps3 some parts are missing including the power eject pcb i can take the psu from my fat ps3 and test the motherboard. but is there a trick to power on by short certain pins on the power eject conector?

 

[truemaster]

found this too https://psdevwiki.com/ps3/Switch_boards according to this if i short pin4 and gnd it will power up but it doen't do anything