Mercedes E w211 dashboard faulty- repair

[kusasusa]

Hi all,

I have a MERCEDES A 211 540 8947 by vdo 110.080.284/038.
Dashboard switch on and a couple again switch off, analog clock on dashboard just rotate.
So again and again repeated ( switch on,switch off).
When the dash switch on show the normal display with backlight, value km ...
I tested the car with other dash and worked fine.

I replaced:
All capacitors
Ic for can

I desolder all pbc.

I rewrite eeprom 24c16.

What should I do still?

Thanks in advance.

Best Regards