Mu daughters 2001 MDX started fine the other day when I went to move it out of the drive way. Everything worked. Now when I go to start it, all I get is a very faint hum or whine when i turn the key. The starter and solenoid was replaced about 4 months ago. Alternator and battery were replaced just over a year. All the windows and accessories and sunroof work fine. Tried jumping it and same thing. I tried tapping on the starter thinking it was stuck. same thing. And the green key logo flashes like it should telling me the system recoonises the keys. Perhaps a relay or something else as I would hate to replace that starter again. Any help or ideas are appricaited.