May I ask how you made it work?
I just bought an A3000 (desktop), just like yours and I want to use an Acer L1716 monitor that I have sitting around my desk.
I hooked it up but I get no image. Just playing around, I connected my Shinco HDTV which has a VGA out connection and It worked, but the apps bar was kind of fuzzy.
Thanks.
I've got my A3000 hooked up to an Acer AL1916W and it worked without having to make any special changes. I was going to recommend that you ensure your Amber is enabled, but it seems that it is if you can get it to work on your TV.