Chosen Solution
Hi I have replaced 2 power buttons on 2 iphone 4s’ and both times when I tried to turn them on after that the phone showed the apple screen then what looks like a DOS prompt giving an error message. I have no idea what I can do about this. I even had to buy someone a new phone! please help! I do repairs all the time so I’m no rooky but this has me stumped.
Do you mean a NAND error? i.e. text flashes on the screen with the word [NAND] and a bunch of small letters/numbers? If so, this is usually caused by a flex cable. disconnect all flex cables except the power flex. turn on the phone and see if it will boot normally. if so, then figure out which flex is bad and replace. jessa
never heard of an iphone giving a error message its a straight forward repair you must have damaged the motherboard whan removing. a pic of the error message would help
