Hello, that set has a pair of inverter boards (back light boards) that usually are the cause, you may want to look for bad connections on the transformers and check the little white fuses to be sure their good. But these sets are getting old enough that I've seen the florescent tubes in the display go bad and cause the set to go into shutdown. If you want to try the bak light boards, I found these on E-bay for $20......thanks