iPhone shuts down suddenly and stays blackHi, My iPhone 4s now several times suddenly shut down and stayed unresponsive for a long time (1h), at any battery stage. (1)...
Answer to: iPhone shuts down suddenly and stays blackWell, after I had replaced the battery and nothing had changed, I however noticed that the phone was heating up. So it meant that there was well some energy... After some google I found iPhone 4 stop working then overheating, where it says it could be a problem of the connections between display and unit. Indeed, in the past, I had exchanged the display once and the backside twice... so I reopened everything and disassembled it agin and rebuilt it back... => and it worked!