CompTIA A+ 220-901 – Q370

A PC power supply has been replaced. It physically matches the old supply and the connectors are properly joined, but the PC does not power on. Which of the following is MOST likely the reason for this behavior?

A. The main motherboard is plugged in backward.
B. The wattage is less than the original supply.
C. The power cable is the wrong type.
D. The voltage selector is incorrectly set.

Correct Answer: B