I have a whirlpool 5 cycle 2 speed washing machine the serial numbers have been scratched off. Here is my problem the washer will not agitate spin or drain water it just hums. If I cycle the timer knob manually it will occasionally try to agitate. I did a master reset and tried to run a small cycle with and empty basket, it filled fine then briefly agitated then stopped and started humming again. The lids switch was bypassed when I bought it so that is not an issue and the timer cycles through like it should what else could be wrong?