6S Shorted backlight cap fixed, but still will not boot.

[TiptonRepair]

My customer decided to get another phone and left this one behind. I may tinker with it again at some point, but Tristar did not fix the issue either The phone never would recognize to the computer even after only removing the backlight cap so I am sure something else got damaged before it was brought in. I only did the tristar because it would not recognize on the computer and would not pull a charge or boot when connected to a known good charge port and battery....