iPhone 6s wont turn on

[dukefawks]

Inject voltage on GPU bus and see what heats up. No idea what voltage needs to be there but do not exceed that of course. Start low and monitor the current.

 

[jessa]

The expected voltage on GPU power here is 0V. Injecting voltage on this rail is a great way to kill a phone permanently. There is no rail more sensitive to injected voltage on the iPhone board than this one.

 

[WeLoveApple]

In the meantime I found the problem. I started changing the caps on the PPGPU rail and after a while it started working again.

 

[jessa]

Or in other words, you reflowed your fucked up tristar placement so that it was actually seated on the i2c pads and the phone worked. You never had a problem on PP_GPU and it is a horrible idea to spend time troubleshooting this line