As I'm having a problem trying to repair a dead Sony 75" XBR 4k, I have located and replaced the faulty SMD style capacitor on the panel board right side for the HAVDD COF 16v input line. This faulty Capacitor was shutting down the tcon. On the input line of one COF driver. As I'm still awaiting a good T con board to put into the TV and see if all systems go As the short seemed to have somewhat destroyed the original Tcon.
I have however driven 12 volts directly to the input line of the panels HAVDD and saw that I was getting sporadic lines on both sides of the screen without a short so that is somewhat a good sign that the capacitor did not go short circuit again.
How many of you have replaced or repaired panel driver boards with success? Of course this is given that the panel boards are repairable without a damaged COF.
Also as anyone run into a situation where tcon voltages do not come up unless the panel is directly connected to the tcoon board? Sony likes to drive their tcons with an independent 12 V from the power supply. This seems to be the case with LG driven Sony tcon boards along with Samsung and Sharp.
I have however driven 12 volts directly to the input line of the panels HAVDD and saw that I was getting sporadic lines on both sides of the screen without a short so that is somewhat a good sign that the capacitor did not go short circuit again.
How many of you have replaced or repaired panel driver boards with success? Of course this is given that the panel boards are repairable without a damaged COF.
Also as anyone run into a situation where tcon voltages do not come up unless the panel is directly connected to the tcoon board? Sony likes to drive their tcons with an independent 12 V from the power supply. This seems to be the case with LG driven Sony tcon boards along with Samsung and Sharp.
