try to RUN the software calibration for diagnose, troubleshooting, fix it.
2) LUBE THE deck belt , this happen because the lack of maintenance schedule, maybe the deck is worn and need replace it. see the video and picture
3) lube the rollers bearing too very well.
4) test the input voltage motor, if there are the motor NEED repair,tight any wires connector for loose
5)measure the output voltage board, for input voltage motor, if there are NOT the board is faulty. use the DVOM OR VOM in both cases.
see the block d, tight any wires connector or wires looses
God bless you
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