Quote:
Originally Posted by Griff
Damaged part: Toshiba AC/DC adapter model ADP-75SB AB
Table top material: hardwood over plywood ...
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Being closer to a breaker box means a surge may seek earth ground via your laptop and its power brick. But nothing listed implies a good outgoing path to earth. No network cable. No phone line. Mouse cable not draped against a heat vent or baseboard heat. No concrete or linoleum floor. Chances are a surge would have found other paths (appliances) to earth meaning that a surge is a low probable explanation for power brick failure. A conclusion that is only as good as the few facts we have.
To have surge damage, a surge must have an outgoing path to earth. Also routine is to have a surge pass completely through the computer to not harm the computer, but harm the modem. A most common reason for modem damage is AC electric. But your post implies no good outgoing path; making damage due to a surge low on the probability scale.