HOW TO REPLACE A FAULTY T'CON BOARD TO LCD TELEVISIONS

Part -1
     What is T'Con board.  This is the board that controls the pixels in an LCD television.  It is connected between main digital board, and LCD panel.  Fault to this board is a common problem to all brands of lCD TVs.  
     For a Sony KDL52XBR5, if its stand by light blinks 5 times, then a pause, again blinks 5 imes, means T'Con error.  The T'Con board is attached to the LCD panel and is included with a  new LCD panel along with the inverter board.  The first check to do is, check the connections of flat cables to them. See the picture of some of flat cables connected to T'Con board.

     How to make sure that the T'Con board is faulty.  So many strange screens will be displayed, if T'Con board is faulty.  Here are pictures of some of them. 

In most cases TV may show other symptoms too. If T'Con boards' processor IC gets direct shorted, it will apply a more load to TVs power supply section, and in some sets the technician might go before it. Check all the connections to both end of each ribbon cable connected to this board.  Normally, these boards are not repairable, except for some capacitors or SMD type fuses can.  How a T'Con board look like.  This is the picture of a typical T'Con board.  The shape and appearance to this board may differ to different TVs.

For Sony KDL32BX300, six blinks, pause, six blinks indicates a back light error and location is on the LCD panel. Not with T'Con board. The LCD panel includes the "Inverter MT board" and T'Con control MT board.    So different brands of televisions will show different blinking codes.  The technician must fully aware of these blinking codes. 

 Contd: