I have no readings between ground and pin4.
I have an AMD version (Thinkpad X13 Gen1) of the same laptop (same chassis, same battery) which behaves exactly the same.
Went through this video to grasp what a pull-up/pull-down is but still have to understand what I should test with my multi-meter (I am expert at IT but not at all at electronics).
Tried to power up the laptop and it won't power on anymore. USB Power voltage now reads 5.2v instead of 20v and I can hear some coil whine when the AC adapter...
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