Back to the topic at hand:

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It started showing the “I’m stuck, pick me up and move me message”. (...) Restarting it would some times fix it. Until it wouldn’t.


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The forums suggest maybe dodgy bumpy switch or the circuit that senses it. Some people suggest replacing the switch fixes it, others say it does not.


The problem description certainly sounds like a dodgy sensor of some kind. I once had a car CD player which would keep ejecting the CD every time you inserted one, because it had terrible leaf spring switches to sense when the various parts of the transport mechanism had done their jobs. I would have to dismantle the player and clean the leaf spring contacts. It would work great for a few months and then get dodgy again. This sounds like the exact same problem to me.
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Tony Fabris