Unfortunately, I do not have the service manual for the LW 300 (I have it for my IWIIs, and my SWs), but I'm sure I can find a copy of it online. I'm hoping its just capacitors, and not the motor that is fowling up.
Btw, I found this link that mentions a similar problem with my LW 300. http://www.fixyourownprinter.com/forums/laser/70488
Thoughts?