This device worked normally before, right? It may be that the battery is dead. Please use a multimeter to measure the battery voltage, or try to replace the battery with a new one.
This device used to work, didn't it? Maybe the battery is dead. Please use a multimeter to measure the battery voltage, or try to replace it with a new battery.<br>
This device used to work, didn't it? Maybe the battery is dead. Please use a multimeter to measure the battery voltage, or try to replace a new battery.