Iskra Unimer31 multimeter does not recognize the internal 9V battery
Greetings. Does anyone know what could be the fault of the Iskra Unimer31 multimeter that does not recognize the internal 9V battery, since I checked it and I did not see any defective parts. The only thing is that it is not measuring on the Ohm scale or on the DC or AC voltage scales. Anyone with an idea?