There is no response when the multimeter measures the capacitance, there are two possibilities.
1. The capacitor has been disconnected. We know that the multimeter measures capacitance, mainly using the multimeter as a DC power supply and an ammeter. When the capacitor is connected to the DC power circuit, the capacitor is in a charged state, and the ammeter will indicate (that is, the multimeter will respond). If the multimeter does not respond at this time, there is only one possibility, that is, the capacitor has been disconnected (ie, open circuit).
2. The battery in the multimeter is exhausted. This problem is easy to check, turn the multimeter to the ohm gear (any gear will do), touch the red and black test pens, if the multimeter has no indication or the pointer does not move (pointer multimeter), it means that the battery is exhausted. If the multimeter has an indication or the pointer resets to zero, the battery is still charged.
If the multimeter has a gear for measuring capacitance, the capacitance must be discharged when measuring capacitance, otherwise the multimeter will be easily damaged, resulting in inaccurate or no display of the multimeter.
