Studio Color Issues

Hey guys I have a 575 I am working on. I get a:

Tilt Stop Err

when I power up the unit. It also tries to tilt but then hits the end of its like and it goes "wrrrrrrrrrr" as it tries to keep going.

I swapped a tilt motor and the sensor that is in the arm from a functioning unit and I get the same error.

What else could produce this error? I was trying to troubleshoot a lamp not striking, but I cant get past this to look at the lamp.

Thanks guys!

Mike
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