George has just finished upgrading a 350-watt PSU in his desktop computer to a 650-watt PSU. The computer was working well before the upgrade. He boots the computer and discovers that the BIOS doesn't detect one of his SATA hard drives.

A. Which one of the following should he do?

1. Use the switch on the PSU to switch from 110v to 220v.

2. Make sure that the hard drive is connected to the PSU connector.

3. Manually enter the hard drive parameters in BIOS.

4. Take out the 650-watt PSU and reinstall the 350-watt PSU.

5. Reconfigure the master/slave jumpers on the hard drive so that it will work with the new PSU.

B. Explain why the answer you chose is correct and why each of the other answers is wrong.