Hi,
I bought an ACA1221 in August 2015 with the intention of getting a WHDLoad A1200 system setup. I finally got round to it today (I have children...) and the board initially worked, on a KS3.0 machine I had, but was unstable - I decided to try it in a 3.1 KS machine I had but it wouldn't boot - black screen, green power light (not pulsing) and no response to holding down both mouse buttons.
I swapped back to the unstable 3.0 machine and now the same thing happens there.
Do I have a dead board?