1) LUBE the deck belt,you have a WORN deck belt, this happen because you didnot lube according with the schedule maintenance
29 LUBE the rollers bearing too
3) Test the drive belt motor, for worn or crack, or adjust if is possible
4) Test the input voltage motor, if there are the motor need repair
5) Test the output voltage board, for input voltage motor, if there are NOT the board is faulty.
God bless you
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