The stories on AppliancePartsPros.com helped me troubleshoot the problem to a bad control board. I paid for overnight shipment and fixed the dryer the next day! The fix cost me only $200 for the part, whereas I estimate it would have been about $500 for parts and labor to have a repairman do the job. ($250 for the part, $100 for the first visit, $150 for the next visit and time to do the repair)
Hot tip: Don't forget to put the 5 screws back on the new control board! It "clicks" in so well without them, I forgot to put the screws in until after re-assembling! DOH!!