The most common fault with the HEQ5 electronics [after poor crimping
of both ends of the hand controller cable] is condenser failure. If you remove the front cover of the mount you can see two large condensers at the bottom
front of the circuit board. If either or both of them are bulging you can get new ones from Jaycar for about 75 cents each. You will need a high temperature soldering iron. Worth a look before shipping the mount.
raymo
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