One of the most common reasons for a multimeter not functioning properly is a dead or weak battery. Make sure to check and replace if necessary. Another potential issue could be faulty fuses. But when it stops working—whether it won't power on, gives no readings, or displays incorrect values—it can be both confusing and frustrating. We'll explore everything from simple user errors to more complex internal issues, equipping you with the. When your multimeter's display goes blank, becomes too dim to read, or shows only partial segments, it can stop your work completely. The frustration is. If you're wondering, “Is my multimeter broken?”, this comprehensive guide will provide you with the necessary steps to diagnose and troubleshoot common multimeter malfunctions. Inaccurate. As a crucial tool in any electrician or DIY enthusiast's toolbox, a malfunctioning multimeter can be frustrating and even potentially dangerous.