do a cold restart instead:
find a plug or switch that is supplying mains power to the panel and cut it off.
If you can not find any of the above unscrew the one of the two AC terminals paying attention it doesn't short to the other AC terminal.
Unplug the minus pole of the battery (black wire).
Wait for a minute
and plug everything back in the reverse order (battery first,AC second).
hope this helps