PPVCC_MAIN Interesting Diode Value

hello there,

repairing expensive electronic devices in a "I'll replace this, then that and see what happens" scenario is the wrong way. To fix something, you need to know how it works. If you don't know, just learn. Knowledge and books do not bite. You replaced Tristar unnecessarily. In this model does something else.

the resistance value of the VDD line (this is not VCC - the marking makes a difference) does not necessarily mean a short circuit in this place. The main power manager rarely crashes like this. Remember it's a semiconductor. Make drawings, photos and check the scheme of this subsystem. At the input there is a switching transistor to the backlight line. If its path has not been closed, it will give a short-circuit image on the PMU. Follow the rabbit.

take a look at my blog, you will find some advice on similar issues (address in "about me" tab), although I will admit that iPads have not yet been prepared. Maybe in the near future I'll be able to find the time to do that.