I received my Harmony Encore yesterday and so far really pleased with it. I have the micro SD version, updated the firmware to Pal 50 and downloaded the entire 2600 roms collection from Atari Mania. So far it's working great on my on my 2600 Jr and 6-switch 2600, both over RF video on a modern TV. I have a question though that I hope someone can help with... I've downloaded a handful of PAL roms from different places, forum threads and other download sites including Montezuma's Revenge, Thrust+ and Zippy. Although they worked, they are only displaying in black and white mode. Montezuma's Revenge has flickering green blocks at the bottom of the screen, but the actually game looks fine, apart from being in black and white.
I've tried the reset button, toggling black and white button etc but no luck. Every game I've tried from the Atari Mania collection has worked fine. I'm wondering whether the Atari Mania roms are perhaps prepped in some way for the Harmony cartridge, where the roms I've downloaded are not? Or perhaps there's something in my setup that I need to look at, such as my power supply. I'm looking at upgrading one of my machines to AV out soon so I'm hoping that could make a difference. Any suggestions welcome and thanks in advance!