I am having a hard time figuring out what the issue is. The controller charges just fine to a full 4.2v and works on the PS but once I unplug it, it turns off. I also noticed that once I press the PS button, it lights up for a split second and then off. Voltage is getting to the battery and from the battery to the PMIC and that is where I am stuck. There was also a bit of water damage on the gyro U4 chip area but its nothing serious and I touched up the solder contacts on the components. Also tried a different battery but that was pointless as I do see the 4v going out of the battery.
Any suggestions comments, all are welcome. Thanks.