[Hull_chipper]

Then maybe there is a difference between PAL/NTSC units. If you leave the a/v lead out it flashes green/yellow. It will not however blink 3 times before turning red, so even if you have left the a/v lead out you can tell if the install was successful.

If it flashes red/yellow, you have a board fault (common, but easily fixed when fitting LPC mods). It only displays a fault indication when the do point is grounded, which makes testing the chip very easy.