i work on alot of 4700's and they are not bad at all. They are very susceptible to static. 9 times out of ten, it just needs a relearn. the other is adjusting the pot. But first, visually check the plastic articulating arm that is connected to the lift pot, that it is not cracked or broke. You can use a alternate method for relearning by pushing the speed mode and turtle mode switches.
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