iPhone 5 fast discharge idle and hot without much processing
I'm a electronic repairer, including phones. Some days ago a client sent me a iPhone to repair, but can't discover the inssue...
When i get it, battery was dead, iphone didn't charge it or show low power, so i removed and charged outside util is at 20%. After that i inserted again in iphone and i let iPhone charge to 100%. It charges well and fast with my 2.1A stabilized charger.
iPhone itself was full of apps, location services was OFF with IOS 8.3 (If i renember well).
But after the charge battery starts to drain fast, maybe 2h util reach 20% in sleep mode and airplane!
I have done a full format - reset - upgrade to 9.3.1 with no success of fix.
I don't know about U2 Chip, but it charges well, fast and switch on very well.
Beside that iPhone got hot when in use near apple logo, where CPU is, if i put the finger in the metal shield i can fell how hot it is.
When in sleep mode is not hot, but i can fell a little warm compared to the other parts the temperature is not the same.
After i tried a new battery, it survive more time but do the same symptoms...
LCD have problems too, backlight blinks sometimes, touch not very resposnive, i tried to clean pins and get better at digitizer, still backlight is faulty.
Backlight pins are not isolated, maybe it cause a short on metal plate?
Anyone with same symptoms that can advice me?
Is this a good question?