VRROOM: no picture, black screen or signal drops

Fix it step by step

1. Check the OLED first. If it shows OLED OFF or nothing at all, use the supplied VRROOM power supply (not a lighter USB adapter) and press any button — the OLED fades after 30 seconds by default.
2. Replace suspect HDMI cables. For 18Gbps signals use certified “high speed” cables between 6 and 12ft (2–4m); for 40Gbps links every cable between a 40Gbps source and sink must be a 1200MHz-certified or tested 8K cable in copper or fiber. Very short 1ft cables between VRROOM and display are a known cause of intermittent drops.
3. Check the port for old displays. An HDMI 1.x display or projector must be connected to the TX1 1080p downscale output, not TX0.
4. Verify the TV input itself. Many TVs only accept 4K60 4:4:4 (600MHz) on specific HDMI ports and only after enabling an option such as Samsung’s “UHD Color” (Settings > HDMI > UHD Color, plus assigning the port as “PC”). Check your display’s manual for its full-bandwidth ports.
5. Fall back to a safe EDID. On the web server’s EDID section (or OLED menu > [EDID Mode]) select the FIXED test EDID — a 4K60 4:2:0 300MHz table that produces a picture in almost every setup. If the picture returns, step up through EDID banks until you find your chain’s limit.
6. Restart the source after EDID changes. Some sources (Xbox One S, Samsung K8500 among others) need a full power-cord unplug between EDID changes.
7. Issue a hotplug. Web server > CONFIG > ISSUE HOTPLUG performs a soft reset of the HDMI chain without rebooting anything.

Short resyncs are normal

A brief black screen when content starts or the format changes (60Hz menu → 24Hz film) is a normal HDMI resync. Any device inserted between source and display — AVR, switcher, matrix or VRROOM — adds one; it is not a fault.