HPS10 Display problem

I have HPS10 width specific display problem, graphic parts of screen display waveforms, cursors and grid ok. But in any text/numeric field I have only line. I try to make reset default holding reset key 10s but its not work.
I try another LCD display but no effects. Its look like character generator memory fault but this display not have any internal character generator.

I think its a problem in PIC memory but in another post in forum I read the memory dump is factory secret.
Its any authorises service in Poland when I can bay or reprogram microchip?

This scope is old construction and low parameter (sampling) and I think You can upload BIN file, no code.