I have a "Touch Focus error" and the blue color is the problem with my Toshiba 53H71 TV. There are two ckt boards on the blue tube, one on the socket and the other on the neck. I didnot see ant ICs on these boards. What board are these Ics on ? Do I get to them from the front or back of the TV?
These IC's your looking for are located on the main printed circuit board and are standing up black 3x2 rectangular against a large metal heat sink. They both should be replaced at the same time and do not forget to put new heatsink compound on the backs of the new IC's before you replace them. you really should get the service manual before you proceed with this repair, as after you are done you will need to perform some alighnments to the convergence and possably others as well. good Luck and let us know how this turns out for you.