Inductive coupling can occur when significant nearby lightning strikes create an electromagnetic field that passes over the cabling. I have seen it take out modems, ethernet cards, fax machines, networking cable drops, etc.
Spikes resulting from a power loss (even with line conditioners) typically damage power supplies.
If the computer powers up, it was probably inductive coupling. If there was no storm activity, it could be component failure due to wear and tear.
It can be replaced.
First things first, check to make sure everything is plugged in correctly. Test the cable on another system.
Could be something as simple as the cable failed...the computer may be fine.
“First things first, check to make sure everything is plugged in correctly. Test the cable on another system”
She is connecting wirelessly.