Dishwasher has power, when run diagnostic the "Water Heat" light stays lit and the "No Heat Dry" and "Lock On" lights blink. I have tried resetting by disconnecting power. I cannot release the lock by holding the "No Heat Dry" butto for 4 sec. What could it possibly be? I'm pretty ignorant with electronics and don't have test equip. I'm hoping for simple grease monkey type repair but, I don't know how to diagnose. With the price of repair by a technician is it worth trying to repair myself or buy a new unit for about $700. Thanks for any help.