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Old 08-14-2007, 05:55 PM
Brian Carlton Brian Carlton is offline
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Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Start here:

http://www.gdl-online.com/testproc.html

Follow the test procedures to determine whether the actuator or the amplifier is the problem.

These fellows also rebuild the unit for a reasonable charge.
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