オリジナル投稿者： Chris Stables ,
I don’t think it will be the proximity sensor but you will have to rule it out as well as all the other parts including the battery and dock assembly. Disconnect all the flex cables except for the battery and dock connector and see if it will restore. We would usually put the logic board into a known good housing. That would rule out all parts and would confirm it is a logic board issue. Error 4013 is usually caused by a communication problem between the NAND and CPU, if it is not a parts problem it will be an expensive repair.