Ursprünglicher Beitrag von: Marius Werdecker ,
I think it is the rear camera. A bad causing under voltage would cause more trouble like a unresponding or ghosting touch screen. Replace the rear camera first. This was a very common problem of iPhone 5 that the rear or front camera stops working and causes crashes of the camera application. If this doesn´t work out please post your results so we can check the next steps. Use this guide [guide|10699] and good look to you.