laser writer pro repair guide

I have a laser writer pro 600 that won't start up. It sits here with
the lights flickering as they do in start-up, and once an hour, I hear
the motor assemeblies start to power up, but then they stop and the
lights just sit here and keep blinking. I have tried looking over
things for something obvious like a shred of paper blocking a sensor,
and I cannot find anything outright.

I have tried googling for technical info or repair guides for this
printer to no avail. Does anyone know of a site that good techincal
info on the internal hardware of these printers? More than just a guide
on installing a hard drive, that is.

jt