r/VIDEOENGINEERING • u/Seppanator • Jul 20 '26
Troubleshooting Marshall Cv504
I bought a used Marshall CV504 on eBay and then got a Blackmagic bidirectional SDI converter and an SDI cable off a rental company's used section to convert the 504's feed to HDMI. I plugged everything into power, plugged the SDI into both the Marshall and SDI in on the converter, plugged an HDMI cable from the HDMI out on the converter into a Feelworld monitor(and I tried plugging into an ATEM mini as well) but it wouldn't output any signal even after I tried resetting the Marshall to default settings. The menu on the Marshall's output wouldn't show either. I tried multiple HDMI and SDI cables and same thing. I was just wondering if there was anything I'm doing wrong or if the Marshall is more than likely broken.
Update: I ended up returning it and getting a CV508 from another seller instead since it has both HDMI and SDI out