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U1604A: Frontpanel buttons no reaction anymore after battery change

Question asked by olaf on Sep 18, 2014
Latest reply on Sep 18, 2014 by algoss
after changing the CR1220 battery inside -the real time clock showed nonsense- and turning on the U1604A, no reaction of the front pushbuttons anymore. The only button which works is the on/off button. The display is working and showing the signals. That´s it. A second osci has the same problem now.
Best regards