Got another 32" LG TV recently, model 32LH40, the problem is when turn on the TV, everything works good, but a few seconds or so, there picture gone, but it has sound, the backlight is on. NO display when I press menu.
This is the similiar problem with another same TV, though that one can work longer (half an hour).
I suspected the t-con, so I changed the t-con with another same model tv, but the problem no change. So the problem may be from main board, the panel is unlikely becuase it works perfect when turn on.
Any idea on the main board to stop the picture signal? What I can find is that the 12V power output, when opicture is normal, it reads 11.8 V, but when the picture gone, it reads 12.08V.
BTW, when the picture gone, I measured the voltage in the T-con, it reads normal.
This is the similiar problem with another same TV, though that one can work longer (half an hour).
I suspected the t-con, so I changed the t-con with another same model tv, but the problem no change. So the problem may be from main board, the panel is unlikely becuase it works perfect when turn on.
Any idea on the main board to stop the picture signal? What I can find is that the 12V power output, when opicture is normal, it reads 11.8 V, but when the picture gone, it reads 12.08V.
BTW, when the picture gone, I measured the voltage in the T-con, it reads normal.
