Purple tint on HDMI output running Debian

[dave-at-axon]

When I run the A10S with a 7" LCD, the colours are good.

If I reconfigure for HDMI at any resolution, I get a purple tint on the output.

I know the HDMI cable and TV is good because my A20 displays perfectly with the same cable.

Has anyone else seen this with the A10S?