I've used the greenlee dm-60 for a few years without problem. Today \when i turn it on and want to check any ac voltage it reads O.L. I know it means overload. But Why? I've got it on the V~ at the 200 setting for household current and have the cables in the usual V?Hz for red and COM for black position.

Measuring Tools & Sensors - Greenlee - Dm - 60 Digital Multimeter Voltmeter Ohm