Bally E-2000 series problem, need help

[Alextronised]

Hello NLG members,

I’m new here and already have a question, hope anyone can help.
I have 2 bally e-2000 series, one is working fine and one I bought a year ago isn’t.
I’ve had it for more than a year in the garage without looking after it, when I bought it it worked pretty fine.
But now when I have the time to fresh it up it won’t work anymore.
The LED display doesn’t give nothing, only 5 dots.
Does anyone know what 5 dots without a code means?

Thanks in advance!
Hope to be an active member in the future.
Alexander