HOW TO DETECT T-CON BOARD FAULTS WITH LCD TV

  T'Con board [Timing Control Board] is one which controls the on screen pixesl of an LCD TV.  It connects LCD panel to digital Processor section at the main board.  This board will be ussually fitted to dispaly panel of an LCD tv.  In most cases, it will be shelded with a metalic shield to prevent interference. Thee boards can be defectvie irrespecive of Brand and Model.  A defectve T'con board can cause, very dark picture, vertical lines either with entire screen or will be displayed partially, improper color reproduction etc:- The first to check is its connections.  These baords are connected with flat cables.  No solder joints.  They are connected to small sockets either side, and will be locked.  The lock can be released.  Release the lock, and reinsert it.  In most cases, loose contact or improper connection to these wires can cause several display problems.  Picture of T'con boards are attached.

  These boards can be purchased either from the authorised service center  for thos company, of from electronic spare part selling shops at your town.  It may cost around $35 to $70.  See the clat wire connecting sockets. In most boards, there will be three such connectors.
  Lift up the black flat lock.  The flat connecing wire will come very easly out.  Check the connecing contacts fo the wire for any dirt. If is, clean it with a smoot cotton cloth dipped in rectified spirit.  Drey it well.  Reconnect it back in to position.  If this do not help you, make sure that the board is faulty.
  If the board is faulty [shorted digital processor IC], the large IC on it will over heat.
  With some sets, the picture will be perfect for some time, say 20 minutes or so, and will go blurred.  If so, check the contact between the main digital IC to its heat sink.  The IC will heat up to an extent, and to radiate heat away from it, it will be fixed to a metal heatsing [or to the panel chasis  itself], after applying some heatsink compund over the IC.  When replacing this board, make sure that this heatsink compound has applied.  This compound can be bought from most of the electronic spare part shops.