After turn on scope, we can see some ligth on LCD display but no image, buttons CH1, MATH, CH2, AUTO, RUN and V0 stay lighted up.
Internal battery was dead and was replaced, but no effect.
Oh, ok.
I already tried that but scope dos not enter in recovery mode, even when it turns on normally.
There is a way to do recovery via serial terminal?
serial number: T 1G/012 018736
Bought some time ago, back to 2012/2013.