I have repaired lots of video equipment over the last couple of years so I thought I would start a “repair” category.
This one was initially reported a faulty HDMI but it was really a flickering screen on the Hyperdeck. Almost blinking off and on as if it couldn’t lock onto the input.
Turned out to be the thin ribbon cable from the front control PCB to the LCD screen. This is held in place by a very small plastic clip that is not joined to the connector (unlike others that slide in and out or pivot up/down to lock the cable in place).
This piece of equipment lives in a road case and gets transported every week so has had a hard life. Hopefuly it keeps going a bit longer.