GLTF2940ES3 Washer will not speed spin

The washer would reach the speed spin cycle and shut down. I took the bellows off the bottom of the tub and cleaned it. It still would not spin. Spoke with a "repairman" that I know and he thought it could only be the control board. Purchased a $160 control board, installed it and still no spin. The machine does everything fine up to the point of the final speed spin. The drum will roll back and forth a few times like it is agitating, the timer hits about 7 minutes and then goes blank and the machine shuts down. HELP!