I just want to let other EPLUS owners know
on my winter EPLUS I encounter glich, I would not call it problem.
after turning on power which connects battery to power board /lower circuit board inside original NMH battery/ I pressed power button on display/controller -
-result was ERROR 1 .
But when I waited 5-6 minutes before pressing power button initialization was OK , no ERROR.
I would call it inconvinance sort of that I needed to wait before pressing POWER button.
I am sure some owners would not figure out that they had to wait before pressing POWER on disp/controller.
what I described is no doubt communication protocol error between disp/contr and processing/contr board.
I replaced upper processing/control board and now there is no delay.