The H and 4 error is a Fuser related issue.
The fuser is the heated roller than seals the toner onto the paper. It could be that it was damaged by a power surge in the storm but sometimes it can be a temporary error that can be reset.
Can you try pressing buttons clr, exposure, clr, exposure, in that sequence. The display will then blank and when it does enter 14, and press the prnt button.
Use the clr button several times to get out of the menu and try it again.
If the problem persists the fuser is faulty.