Chosen Solution
iphone 6 error 4013. I removed and reprogrammed nand but once the phone is returned the phone is not recognized. I checked all pins under nand and condensers, line 3 volt and 1.8 volt and there are all. The telescope without nand mass is not even detected. What can I check? connecting the cable phone I have 2.70 volts on battery connector TRISTAR?
Sounds like you are on the right track with 4013 and reprogramming and reballing NAND…I would definitely try Tristar for the USB Voltage Charging issue…have you checked the VCC_Main and BATT lines for voltage check and caps around U2? If you reprogram NAND, Tristar (Tigris) would be a cakewalk and worth the check.
