Have you tried CAREFULLY lubricating the moving mechanisms at all ?
You might also try checking to see if the unit is level or not. If it IS level, try unleveling it slightly. You might have to try slanting the unit in slightly different directions until you find a cure. I had a philips based unit that would "whir" when it was completely leveled. Throwing the unit slightly off balance was enough to get rid of the whirring that was driving me crazy. Sean
>
You might also try checking to see if the unit is level or not. If it IS level, try unleveling it slightly. You might have to try slanting the unit in slightly different directions until you find a cure. I had a philips based unit that would "whir" when it was completely leveled. Throwing the unit slightly off balance was enough to get rid of the whirring that was driving me crazy. Sean
>