Hi Chris, the “Green” phenomena at Shuttle HDMI-Input is well noted since long time. We have tried with diffrent labtops PC, MAC, no way. If we use HDMI-SDI Converter from Righton (https://www.righton.com.tw) and feed SDI to Shuttle, the signal become OK.
Last week we have a customer, who ordered the Shuttle 2 to play his movie in DNxHD-Quick time, which was copied from his Macbook to SSD. The Shuttle played back without audio. OK, i told him to record the film directly from his Avid-NLE (MAC) via HDMI. It was green. OK we changed to a Sony VAIO-NLE. It was again green.
The last trick was the a.m. HDMI-SDI Converter. It worked, but the time over! What a disaster!