What should you do if the DMM is showing no reading during a voltage test?

When a digital multimeter (DMM) is showing no reading during a voltage test, the first step to troubleshoot the issue is to recheck the connections. Ensuring that the probes are securely connected to both the DMM and the circuit being tested is crucial. Poor connections can result in an incomplete circuit or failure to measure voltage, leading to no reading being displayed. This troubleshooting step addresses a common source of error that is easy to overlook.

While adjustments to the range setting or checking the battery could also potentially resolve the issue, those actions are typically subsequent steps after confirming that the basic connections are secure. Addressing connection issues first helps isolate the problem effectively, allowing you to focus on more complex factors if necessary.

Therefore, validating that the connections are properly made is the most immediate and logical action to take when faced with a non-functional reading on the DMM.