Update on this issue with the microHDMI to VGA adapter:
After using such adapter without realizing that is an active component requiring auxiliary power through a bad made microUSB, I ended up with a fried motherboard.
The problematic IC was the Power Management one as it got hot as hell after few seconds of turning on the tablet. The tablet was unusable because Intel Thermal was throttling the CPU down to 0.5 GHz, but besides this problem and the fact that it had huge battery drain the laptop was working .
I didn't take the risk on replacing the PM IC because I had a good offer on a new motherboard for the tablet. And also because the PM IC might have not been the root of the issue after all. It's possible that it got so hot because something else was putting huge loads on him, and the high current flow made it hot. That something else could have been the GPU integrated in the main SOC (not worth replacing IMO).
I've put this out here for research purposes.
Inviato dal mio XT1572 utilizzando Tapatalk