I have a digital multimeter DT830B, and I suspect it is damaged. I think sometime ago I tried to measure something wrongly, and maybe I broke it.

Its display is working OK. When I turn it ON, it shows me some numbers varying and then goes to 00.0.

I try then to measure voltage from an electrical plug or battery, but the numbers stay at 0.

How could I test the multimeter itself, or the cables (red and black) used with it, to try to discover what is wrong?

I tried to open it to find a fuse, but could not identify any.

**update:**  

I opened the device again, and I think I managed to see why it's not working: the "fuse" is really burnt, but this one is "printed" in the board, as you can see in the image. I think if I solder it again it maybe work. Its construction is really very ordinary.

[![multimeter board PCB trace](https://i.stack.imgur.com/AA7F0m.jpg)](https://i.stack.imgur.com/AA7F0m.jpg)