Hi! I ordered and received an AGA MK3 4000D/CD32 earlier this summer and am finally installing it. The instructions seemed reasonably clear and installation proceeded smoothly. Bending the pins out of the way was easy enough and it was clearly needed, so I know I have the board in the proper orientation. Also, everything matches the photos.
However, on power up, I have no video signal from the board at all, either on VGA or HDMI. The computer is booting and behaving normally, with correct output on the built-in output, but I have no signal from the MK3 whatever as far as my monitor is concerned. The monitor works fine on both HDMI and VGA with other systems, a PS4 (HDMI) and PC (VGA).
I also installed the optional CIA chip adaptor and I have no response to left shift-control-tilde; I press it, and if I have my cursor in a command line, I see an inverted character on the CRT, but no behaviour changes happen - perhaps of course because there is no video signal.
Since nothing was working, I tried removing the CIA chip adaptor and that did not make any change in the lack of video signal, and I also removed, re-cleaned, and re-set the main MK3 board, and also reset the ribbon cable (making sure not to change how it was connected) and again, no response.
I suspect that I have a DOA board but I am happy to try suggestions, I'd much rather find I've made some correctable mistake!