hi i have a ps4 it was working perfect then i got cranky and pulled the power cord out (not angry at ps4) and a usb charge cable for controller after a while of cooling down i pluged back in and the message comes up cannot start the ps4 connect the dualshock 4 using the usb cable and then press the ps button = done next message says connect a usb storage device that contains an update file for reinstallation for version 4.50 or later. you can download the update file for reinstallation from playstation.com. done that pressed ok and please wait then says the update file cannot be used?? (CE-34788-0) press cancel and turns off