What should be done if a multimeter shows an open circuit?

When a multimeter indicates an open circuit, it is essential to inspect the circuit for breaks. An open circuit means that there is a discontinuity in the path through which current could flow, and this is why the multimeter is unable to detect any voltage or current.

By inspecting the circuit, one can identify physical damage, loose connections, or points where wires might have been disconnected. This proactive approach allows for diagnosing the issue and determining the corrective measures needed to restore functionality to the circuit.

Other options may not lead to identifying the problem effectively. Resetting the device would not help if the circuit itself has a break, while replacing the multimeter could be unnecessary if the issue lies within the circuit. Increasing the voltage is also inappropriate, as this does not address the underlying issue of the broken circuit. Therefore, inspecting the circuit is the most logical and effective step to take when encountering an open circuit as indicated by the multimeter.