ROM DRIVE

Recently I rebooted Windows XP. After installation, 1 of my rom drives didn’t appear when I opened My Computer…Furthermore, as the result my other rom drive was unstable and would not work correctly. After I rebooted windows, the drive letter for the 2nd rom drive appeared with a question mark included. After I unplugged the faulty rom drive from my power supply, my other rom drive worked correctly again..I supect the power supply is shot, but don’t want to go out and buy a new 1 and find out this does not solve the problem