I have two separate problems with two different Mac 250K's. The first is I can not get the lamp hour meter to reset to zero. When I push the enter button to confirm a reset, it just exits out of the menu. When I go back, it still shows the same hours. I made sure I wasn't looking at the "total hours" that I'm assuming can not be reset. The other issue is the color wheel isn't finding it's home place accurately. When I go to a color, say, amber, there is a little bit of blue showing at the top. The way they are set up, it doesn't look like the magnet can move on the color wheel and the sensor is on a heavy-duty arm that couldn't have gotten bent. Any ideas O' lighting gods?