Black screen and no sound
I realized that there is a 90 day warrantee on parts and a 30 day limited warrantee on labor for the repairs that were done. As I stated, the original problem was the picture shrinking after a few minutes of the set being on. The repair firm took my control board with them. When they came back to install the repaired control board in my set there was a load spark during the installation, after which I had a black screen and no sound. The repair firm took my set them and installed a "CAP Kit", a STRM6511, and a "D1881". The set worked perfectly until two days ago.
I called the repair firm an they are coming out this Thursday to check out my TV. I am hoping the problem is related to the failure of one of the parts installed to fix a similar problem which occurred after the sparking incident.