Acard ARS-2022D LCD problem

I have an ACARD ARS 2022D which I have been successfully using.
When I switch it on now, the LCD message tells me that it is running an LCD test, but then just displays grey boxes and symbols, and will not continue.
I am unable to select any options or even ESC to go back to beginning.
Have tested the power leads are ok. My troubleshooting section in the handbook doesn’t mention anything about this problem.
Any suggestions please?:frowning:

Whith a duplicator things like to happen. Duplicators are not aimed to display you all the info you want…
Are you a regular user or a businessman.

do you mean regular on the forum or regular user of a duplicator?

I just use the duplicator for personal use.