Re: M55-C2 Inverted picture.

I know the answer to this. Some of these TVs come with an AUO panel, and some with a Samsung panel. The panels are mounted/driven in opposite 180 degree configurations. So if your TV originally had an AUO panel and you replaced your motherboard (marked as "MB" on the ribbon cable) with one from a Samsung panel, the picture will be upside down because the motherboard expects a Samsung panel (rotated orientation). I suspect there's a jumper or resistor on the motherboard somewhere that tells the firmware what panel is connected and what the picture...