Two retro classics in one page: the SMPTE color bars that broadcast television has used as a test pattern since the 1970s, and the bouncing "NO SIGNAL" badge every monitor shows when a cable comes loose. Toggle between the full test-card look and the drifting badge on black — both in one click, both fullscreen.
Use it as set dressing for videos, a convincing idle screen for displays that should look disconnected, or just as the most nostalgic screensaver a modern panel can show.
What people use it for
Film & video prop
Need a TV in a shot to look disconnected or "dead air"? Fullscreen color bars or a bouncing no-signal badge read instantly on camera.
Fake idle display
Make a public screen look unplugged without unplugging it — useful when you want a display ignored but still powered and ready.
Retro nostalgia
The color-bar test card is a piece of broadcast history. Leave it on a shelf TV as deliberate retro decor.
Frequently asked questions
What are SMPTE color bars for?
Broadcast engineers used the standardized bars to calibrate color, brightness and contrast across cameras, tapes and TV sets. Each bar is a precise reference value.
Can I switch between bars and the bouncing text?
Yes — the toolbar toggles between the SMPTE test card, the bouncing NO SIGNAL badge on black, and a combined mode.
Does it prevent OLED burn-in?
The bouncing badge mode keeps pixels changing and is safe for long idle periods. Avoid leaving the static bars on an OLED for many hours at high brightness.