Thank you everyone for the information! I was ready to scrap my HLT-5676SX/XAA until I found this thread. I called Samsung and they contacted a repairman and sent him the replacement chip and a few days later he repaired it a no cost to me! He said Toshiba won't pay for parts or labor and Mitsubishi just pays for the part and the consumer has to pay the $200 service call. Thanks again!