Genie screw drive stops and starts

I have an older Genie screw drive (sd9500) which all of a sudden has started acting odd. It stops partway down and partway up. I tried cranking up the the safety adjustment and even disconnected the safety switch (when there is too much vibration the safety hub hits this switch). I thought it might be the motor thermal fuse but the motor starts right up after a press of the button....doesn't need any cool down time. Now the door goes up a little and down a little....after a minute it tries again. Btw....it never had a photo sensor safety device so that gets ruled out. Being an older unit it is pretty basic....I just can't figure what else it could be. Thoughts?
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On 31 May 2009 22:30:19 GMT, newz54_at_hotmail_dot snipped-for-privacy@foo.com (newz) wrote:

Yeah! Tell the succo company to stop porting SPAM here.
In case you don't know -- only one company has an opener without sensors.
No reply to succo sites....sorry!
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Disconnect the door from the opener and see how it opens and closes, and if something is hanging up halfway up and down/
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newz had written this in response to http://www.thestuccocompany.com/maintenance/Re-Genie-screw-drive-stops-and-starts-376293-.htm : It opens and closes very easy while disconnected. It turns out it was a stuck button on the remote control. Go figure.
hr(bob) snipped-for-privacy@att.net wrote:

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On 31 May 2009 22:30:19 GMT, newz54_at_hotmail_dot snipped-for-privacy@foo.com (newz) wrote:

    It sounds like it is binding. Check it by disconnecting the motor and open and close it manually. If a spring is broken or if the springs are unevenly supporting the door, it will bind.
Note: Adjusting springs can be a dangerous job. If you are not sure you know what you are doing, leave it to the pros.
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