you maybe right. cant get it into forced backlight mode. Today I suddenly got reading of 100v on center pin of that mosfet and diodes under it. Power cycle, then i get 500mV. On one power cycle it didnt automatically turn on like it has been, i had to use the power button to turn on. this unit is acting erratically.
Installed new backlight LEDs. With panel disconnected from microcontroller, on dim bulb, the backlight lights up, but only momentarily as it flashes on and off every few seconds. The bulb remains is dim in this case.
With panel attached to microcontroller the dim bulb flashes bright after the flash of the backlight. I do see blue LEDs light up on the TCON board now but only momentary before backlight flashes off.
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