First of all, merry christmas or whatever you guys are celebrating these days!
I got an ACA1221LC for my A1200 - 1D4 as christmas present and I can't seem to get it working. I tried cleaning both sides of the CPU contacts with eraser, moving and refitting the card several times using different "fitting options" as described on the instructions (half mm, 1mm, 2mm, etc...) disconnected CF adapter and floppy drive and it seems it doesn't want to "wake up". I also have tried three different PSUs (two original from A500 and A500+ that are currently working all right and another one brand new - not meanwell based AFAIK -). All I get is a black screen and no LED activity on the power side (always bright). The 1200 boots just fine without issues without the ACA1221LC.
I also have an ACA500+, so I tried the card on my 500 Plus with the ACA500+ and I didn't even get to the initial menu. Most of the time it tries to start and the numbers on de dismo screen appear dimmer than usual or the lights just come up and then they shut down immediately and nothing happens. Sometimes it stops on initialization (blue screen) and I get a flashing "E0" on the dismo. I also managed to get a green screen a couple of times with the dump attached.
The ACA500+ boots perfectly fine on the 500+ with two CFs + everything connected on the three PSUs.
Anything I could be missing? Anything else I can check on my side?