Chosen Solution
Hi all, working on iPhone 6 presently. It’ll boot up fine when mains charger plugged in and will charge the battery fine, but won’t boot from battery or when plugged into a PC, it just continually boot-loops. When I connect it to the PC’s USB port it tries to come on by itself but can’t get to a full boot and loops. Not sure what’s happening here but thinking I should replace Tristar? Once it’s booted and I remove the charger lead it’ll still function ok on battery, it just won’t boot from it. It seems like Tigris is providing either the USB or battery voltage correctly to VCC_MAIN ok but it’s weird that it’ll operate from battery but won’t boot from it? I’m a little reluctant to start pulling Tristar (or Tigris) if I don’t need to as the phone seems to be fine in all other respects; I’d really appreciate any insights or suggestions anyone has. Thanks!!
The problem there is if your doing an update and not a restore then you will have an updated IOS with the same disabled option you previously had so if it was disabled because the wrong password was typed in even once and then the battery died or was removed then it will be disabled, and if you update that it will be updated and still disabled… You need to do a restore in DFU or recovery and then hope for an icloud backup to get ur stuff back :)
I agree with C9679, seems like I’d try new battery first. .. but could be a weak battery and “fake charging"which the Tristar and Tigress should fix. But if USB, VCC Main, VCC Batt look good…I’d bet on failing battery. I think it sounds strange too… but it is an iPhone ;-) lol
