iPhone 8 - 820-0072 - Dead
Prior Tech Work.
Looking for short & injecting like a habit.
No fix! :(
So I take a look and 10 minutes find 3 shorted components and remove ONLY 3 shorted components.
1) One INTERNALLY shorted component was M2800 - P2,3,4 - Repaired ;) IT WAS SPLIT WITH SOLDER BALLS POPPING OUT THE SIDE
2) The underfilled Tigris was also shorted at 3a limit and showed with Rosin. Ohms reading proved location.
Removed Tigris and still had 3a/0.7v VDD short but NO heat.
3) The shorted component was C303_E found by my method and soaked up 6amps.
Now yes TIGRIS was shorted also but not by C303_E, the chips pads were tested and were short.
Replaced Tigris, Repair, Reball and install M2800 - Device now boots at healthy current.
All M2800 internal circuits operate withing iOs and are all normal.
Usual iOs application/hardware tests proved sweet.
Install new Q3350, missing caps and good to go.
oops! forgot this bit ....