Method 1: Use pointer multimeter will recognize meaning a table pen touch capacitive one foot, then the other in contact with another one, this time hands will rapidly rise and then slowly decline, which is the process of charging and discharging the capacitor, the capacitor is a good description , if not change, then the exchange will lead the above phenomenon, it also shows is good, do not drop that bad capacitor discharge or if the hands do not appear after rising. Landing is not penetrated inside, little hands do not move that failed, large capacitance capacitors with 1X10 file small amount 1X1K or 1X10K file.

Method 2: Use a digital multimeter to measure capacitance: The gear hit the capacitor (capacitance value measured according to your selected files), the test leads with two overlapping capacitance of the two legs, the table has a certain value, then back infinity position, exchange table pen to try again, this time displaying data size a slight deviation, then back to infinity, indicating that the capacitor is good, if not back to infinity, indicating leakage, such as displaying infinite, the internal capacity of the circuit or not.