D board is no longer available.
The set needs troubleshot and repaired to the component level.
Time to call a qualified and preferably Sony trained or other well
experienced servicer for your model.
And even if it were available, the cost would be outrageous. Sometimes
a factory repair shop will swap a board for a set that is still under
warranty, otherwise the solution if for a qualified tech to repair the
board. He or she will troubleshoot your TV down to the component level,
and replace the bad components on your D-Board.
Another reason not to just swap boards: There can be bad components on
one or more other boards in your TV. If you just replace one board
without checking for shorts on other boards, bad CRTs, leaking coolant,
and several other tests, the New D-Board may go up in smoke the moment
the TV is powered on, destroying an expensive board and costing you more
than double for the repair.
