Chosen Solution

So this 6 is my classmates, she said the screen was broken. Tried a new one, still not turning on. Tried a new battery, charge port and screen. Still dead. How could I test the Tristar without removing it?

We recently made a post about using a multi-meter to get a 100% accurate test of the tristar status of good or bad see here: https://www.microsolderingrepairs.com/bl

Depending on the series of 6’s I suggest very strongly go after the TIGRIS first because he is the one that controls the battery with a MOSFET