What should be done with a capacitor that is obviously discolored due to excessive heat?

Correct Answer: Option C — replaced and the reason for the overheating found

Discoloration in a capacitor is a definitive sign of dielectric breakdown or internal leakage caused by thermal stress. Per IEEE 45 standards for maintenance, such components must be replaced immediately. Furthermore, the root cause—such as overvoltage or excessive ambient temperature—must be identified to prevent recurring equipment failure.