Color distortion, wavy blue lines - Mitsubishi WS-65809 65" Rear Projection Television

This is caused by the convergence IC or IC's failing. If it has 2 IC's for the convergence circuit, they are STK392-540. If there is only 1, it is a STK393-110. The Convergence Board is the center board and also includes the Main Power Supply. Great care is needed when removing making sure that all the screws are are removed around the edged of the board, in the center of the board, and on the back side of the heat sink. You also have 5 plug clips that pull up, 3 on the left and 2 on the right. Please remove the power from the set before doing anything. Some times being over zealous, we forget these things. Once the board is removed, the IC' s or IC are easy to removed with solder wick. The heat-sink compound is messy so be careful not to get it on clothing or the rug. Make sure you remount the new IC's in the right direction and use heat-sink compound on the back of the parts to prevent heat from damaging the parts prematurely. once the parts are mounted, reinstall the board making sure the heat-sink lines up correctly and the center screw secured the green ground wire in the center position of the heat-sink. Reinstall the rest of the screws and reconnect the plug clips on both sides of the board. That should do the trick. I do caution you that this is not a quick job and do not rush through it. I hopefully covered all the steps for success.
Good luck,
skyassoc