Chosen Solution
Hello, I will buy a iPhone 6s whose the LCD not working, How to test the rest ? There is any application which can tel me if another part of iPhone does not work ? Thx,
The first step is always to put a working LCD on it. You can’t do much in the way of diagnostics without a screen.
Without LCD its a risk to buy..You can only test if the mainboard/PCB is alive: Connect the iphone to external power and hear the typical tone..after a few seconds move the mute button up an down and the iphone should vibrate..connect it to itunes or insert a sim-card without pin an try to call on the iphone..
