This washer just stopped spinning. All other cycles seem to work fine. I removed the rear cover and tried the spin cycle, the drum rotates both ways then pauses then resmes back several turns in both directions. then the washer sounds done without spinning. I pulled the motor control board and main board but can see no hot spots or burns. The front panel gives time of 8 then 7 then returns to 8 a couple times before giving the completed signal. Drum turns with ease, pump pumps water out as it should but no spin. Help!