Blackmagic Forum

Going from MAC/PC - HDMI - BM CONVERTER - SDI - BM ATM - Distance is about 80 feet - Everything was working great for a conference then came in the next day and only getting black. Tried different Mac/PC but nothing and about an hour later it "mysteriously" came back on after we plugged another Mac directly into a different hdmi in the BM ATM.

Long story but hopefully someone can make some sense of it. Thanks