Sudden death, no response after hard reset
I repair cell phones at my shop. I have received 3 iphones in the past week that have no response at all.
1st. Iphone 5s - I replaced the screen and it never had power or turned on again or communicated with ITunes. I tried the reboot many times.
2nd. Iphone 5s - The screen was replaced a month ago and suddenly died with no charging, or lcd digitizer response or iTunes response.
3rd. Iphone 5c - came in from another shop with no response from charging, LCD Digitizer, ITunes or hard reset.
I have replace charging ports, batteries, and LCD/digitizers with working units on all three devices and they still will not respond at all. Please help.
This is the 3rd Iphone this week with sudden death and for no apparent reason. There is no water damage or physical damage that would cause this problem. The insides look perfect. They will not respond to charging, hard reset, soft reset, or any other thing I have read to try. The mother boards and connectors look perfect under a microscope.
Please help me help these customers.
Is this a good question?