how to check VDD MAIN

Serkan 01/02/2019

My iPhone 7 won't turn on.  I learn from a video with the same issue. and they the VDD_Main is shorted. How do I check VDD_Main. How to measure the voltage?
Answers

Andrews

01/04/2019

Find VDD_Main on the Schematic. Then confirm test points of VDD_Main. Measure with a Multimeter at voltage measurement mode.

REWA

01/04/2019

Find out the shorted rail with diode mode measurement of the Multimeter. Then locate the faulty component with 'rosin detecting' method.
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