PS4 disc drive not working after a repair

Hey all i am pretty new to the repair scene and until yesterday i was doing pretty good but now,

After a repair to a HDMI ic chip the disc drive is not working at all anymore i dont believe it has something to do with the drive since it was working fine.
(Flat cables are all okay)

It is a SAA - 001 board, my question is what are the voltages i have yo measure from the board to the disc drive and what ar places to check.
maybe someone had this similar problen and knows where to look :slight_smile:

English is not my main language so spare my grammar xD

check the fuses on the daughter board. Should be 4 of them

Did you make sure all the cables were plugged in correctly?