I have same problem with turntable.
Rewind and scratch worked perfectly (even without random button pressing) about 2 hours.
Then my rewind won't work - it registering only from about 5th try.
And then scratch won't work at all.
Looks like problems with IR receiver or IR diode.
It will be good to have spare circuit board or just spare IR parts (but IR parts need to be identified first).
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