Hi I repair all brands of laminators in the pittsburgh area. I dont exactly understand your problem.
are any lights lighted? Is the plexiglass cover shut? Is the interlock switch on the feed tray engaged?
Most 4250s have these 2 interlock switches but there are exceptions. early production models are exceptions......
theres a overheat thermal fuse that blows if the machine gets too hot. it results in a no power situation.
feel free to call me for futher info, telephone tech support is always free:)
the motors almost never fail and can be replaced
bob haller sevice and sales pittsburgh pa 412 366 4906
September 2014