![]() ![]() Some Sony TV's are able to sense a T-Con failure and produce an error code. As an example, if the error, like bars on the screen, is on the whole screen it's likely a faulty T-Con board. T-Con board errors tend to show up on the whole screen. Note that problems that show up on half of the screen like bars usually point to a failed main board. This check for the T-Con board also touches on the condition of the main board. If this checks out, move to the next step.Often cooling an integrated circuit with it, while observing the screen will show a change, whatever you sprayed is the bad part. Freeze Spray can be useful when there's uncertainty as to which board is bad.If it is very high, that points to a main board problem.If the backlights came on in the previous step, this is just a double check. Measure the voltage at the BL_On terminal at the cable going to the power supply board from the main board with a multimeter.Plug in the cable running between the power board and the Main Board, which was disconnected in the previous procedure.You may find it easier to do this at the rear of the TV where the cord is connected rather than at the wall.if a problem shows up on half the screen or only a portion, it is likely the main board, rather than the T-Con board. Now we check the main board to see if it is the culprit. Attempting repair instead of just throwing it out is a great way to go. If you aren't comfortable doing internal checks, you can have a technician check it out. ![]() Test leads with insulated clips on your multimeter will help greatly with this.Connect to the ground first, then with one hand check the high voltage connection, or measurement point.Use common sense and where possible use one hand at a time for measurements.Consider the following when taking voltage measurements: Remember that there are somewhat exposed high voltage areas on the power supply board. ![]()
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