It auto starts on vga input. I dont know about rca input, I doubt it. I'll try to find a way to check it.
The nice thing about it is you can disconnect/remove the circuit board that contains the IR sensor, buttons and leds, and it will still autostart on just fine.
Haven't been able to get measurements. I sorta installed the screen in my bezel temporarily. Once I remove it I'll measure it.
I'll try to test the vga tommorrow. My mp3 player has rca output(Cowon Iaudio A2)