Using this Blackmagic Design ATEM 2 M/E Broadcast Panel is quite straightforward. First, make sure you connect it to the correct power supply included in the package. When you turn it on, you can start using the various buttons and controls on the panel. Despite the missing key - cap on the M/E 1 Program bus, you can still use the button as normal. As for the dim system control screens, although they might be a bit hard to see, you can still operate the functions they control. When it comes to maintenance, keep the panel in a clean and dry place. Avoid exposing it to extreme temperatures or humidity. If you notice any further issues, it's best to contact customer support.