Last week a new employee plugged the battery charger into the forklift connector instead of the battery connector. It remained "charging" over the labor day weekend. Tue morning the mistake was discovered, the battery was then charged correctly and everything seemed to work fine.

Then this morning the unit wouldn't power on at all. Battery has a good charge and all the connections are as they should be.

Suggestions as to where to start looking?

Thanks,
Ed T.