I had similar issues and by replacing the 2200 micro (Mu) Farad, 10 Volt capacitor on the PCB, all of my issues ceased.
Below is a link with information supplied by "fixya" that explains the procedure/details.
Hopefully this will solve your current issues.
Good luck,
Mike
http://potlash.org/feast/2010/11/20/repairing-a-jet-afs-1000b/
PS Linda Haus of "Rockler" Technical Support was kind enough to supply me with this link.
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