For what it’s worth, I found this site that seems to have a possible solution. I just replaced a bloated battery pack in mine and get no reaction to the power button. I checked my 3.3v rail and only was getting about 270mv so I ordered a 5 pack of the ITE chips off of aliexpress a few minutes ago to try out. If it fixes it, I will update, but it’ll be a few weeks.
PS: I know this is over a year after the initial post. Just trying to put it out there for future searchers.
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