Identify which capacitors are bad. There are 2 ways to do this:

1. By Look/Feel: Look for a bulged top on the capacitor. You may also feel that the vent has burst. One way to confirm suspicion of a bulged capacitor is to place a ruler on top of the capacitor with the edge touching the top. If the ruler will not stay flat, the capacitor is bulged.

2. (Preferred) Using an ESR meter: You can also use an ESR meter to check for bad capacitors. Once you get the ESR reading, compare it against a table of readings (usually included with the meter) or the capacitor's datasheet.