MK312 Restarts and/or freezes

I got the unit working on the ElectrodesReady firmware, however, pushing the Arrow Right button, regularly makes the box restart. Sometimes it also completely freezes…

I’ve added a 15 K Pull Up resistor to the switch but t still freezes…
Any ideas.??

thanks in advance !!

I experienced the same problem when I tried to use a cheap Chinese LCD.
Problem was solved after I placed back the Newhaven LCD from the parts list.