[CAUSE] The tChassisPowerSupplyMismatch notification is generated when power-supply elements equipped to the physical chassis are not all of the same type. [EFFECT] There is an increased risk of power-supply failure. Intermittent error or damage to components may also result. [RECOVERY] The operator must identify a single preferred or required power-supply type, remove any power-supply elements of other types, and replace them with equipment of the preferred power-supply type.