I wonder when the GoFundMe page will be established -before or after the electrical fire- because one is in this DUmmy's future.
The dropping light covers are because of expansion from heat because of a short circuit.
The TV related problems are too -
As for the keyboard - I'd suggest the crap you had piled on it played a big part in it being accidentally powered on, and you were unaware of it. The buzzing is probably because of 'dirty' power hitting it.
Anyway -
Since the primitive suggests this has happened before, It is probably related to something recently changed. Does the primitive live in an apartment ? if so, I wouldn't be surprised to learn that another primitive in the same building had their power shut off for nonpayment, and has rectified the issue by plugging a modified extension cord into whatever live outlet s/h/it could find, and the other end into one of their outlets to swipe some electricity.
Otherwise, I'd suggest getting an electrician in there ASAP.