regarding the faulty DC socket-- (this is the next thing I'm going to try)
Is the DC socket doing anything other than making contacts between the two conductors (voltage and ground)? Are there additional circuits integral to the module? Mine has normal resistance (i.e. CLOSED, conductive), and wiggling makes no difference whatsoever. Besides, a faulty contact would just result in NO charging, not in weird REJECTION of charging, correct?
(Aspire 5552-5898-- see post below in this thread for more info)
It depends on the notebook models. Some DC socket is part of a power board by itself. And a faulty contact would result in anything it feels like it, with wrong power input who knows what battery and power circuit react