No Signal / TV Static
The no signal prank puts a fake "NO SIGNAL" message on the screen: a black display with a small badge of color bars drifting slowly from edge to edge, like a modern TV with nothing plugged in. Best deployed on a smart TV, a laptop plugged into the family TV, or any big screen you can set running and leave alone.
SIGNAL
Press F11 for maximum realism. Tap or press Esc to exit.
For the best results, add this to the device's home screen. It then opens with no address bar, no tabs and no URL, so there is nothing left to give it away.
It lands because the first instinct is never "someone's pranked me". It's to blame the antenna, the HDMI cable or the box. You get to watch a full round of cable-wiggling before anyone suspects a browser tab. Want the screen to look dead instead of disconnected? Use the fake shutdown screen. Want it to look broken? The blue screen of death does that job.
It is the tidiest of the TV pranks, because nothing is damaged. If you would rather have shattered glass on a big display, the cracked screen page works on any TV, laptop or monitor. With either one, tap the screen or press Esc and the picture comes straight back.
How to use the no signal / tv static prank
- Open this page on whatever feeds the TV: a laptop on HDMI, the smart TV's own browser, or a computer casting a tab.
- Press Launch Full-Screen Prank and the TV goes black except for a "NO SIGNAL" box that drifts slowly from edge to edge.
- If a browser toolbar still shows on the big screen, press F11 on the laptop or pick the full-screen option in the TV browser's menu.
- Once someone has checked the input button and the cables, tap the screen or press Esc and the page comes back.
Putting the no signal screen on a TV: HDMI, smart TV browser or cast
The most reliable setup is a laptop plugged into the TV over HDMI. Set the laptop's display to mirror rather than extend, open this page, press Launch Full-Screen Prank, then press F11 on Windows (or Ctrl + Cmd + F on a Mac) if any browser bar remains.
A smart TV with a built-in browser can load the page directly, with no laptop in sight, which makes the joke harder to trace. TV browsers differ, so if a toolbar stays on screen, look for a full-screen option in the browser's menu. Casting works too: Chrome on a computer can cast a tab to a Chromecast or Google TV from its menu, and the TV shows whatever that tab shows. While the page runs it asks the screen to stay awake on browsers that support it, so the laptop driving the TV does not go to sleep halfway through.
What the fake no signal TV screen looks like up close
The screen turns black and a rounded box drifts across it, bouncing gently off the edges. Inside are a strip of colored bars, a large "NO SIGNAL" and the line "CHECK YOUR CONNECTION". That slow floating message is how many modern TVs and monitors behave when an input goes quiet, which is why people go straight for the cables.
There is no static and no sound. The page cannot reach the TV's settings, inputs or the cable box. It's a picture in a browser, so nothing needs resetting afterward.
Reveal ideas, and when to keep the no signal prank off the TV
It works best in a quiet moment: before a movie starts, or just after someone picks up the remote. Let them press the input button once and look behind the TV, then tap the screen and show them the laptop.
Skip it while people are waiting for a live game or a show they care about, and anywhere someone might start unplugging boxes or phoning their provider. On a single computer monitor, the endless loading screen is the quieter way to stall a screen.
Frequently asked questions
Is anything wrong with the TV?
No. It's a full-screen web page showing a "no signal" badge on a black background. The television, the cable and the box are all fine. Close the tab and the picture comes straight back.
What are the color bars for?
The strip borrows the colors of the SMPTE test bars broadcasters use to check a feed, in the familiar white, yellow, cyan, green, magenta, red and blue order. Most people know them as the "signal's gone" picture, which is why they make the badge look official. Ours are decoration only and are not calibrated for real use.
How do I get it onto the TV?
Open the page on a laptop and connect over HDMI, or cast the browser tab from a phone. On a smart TV with its own browser you can load the page directly, which is the cleanest option because there's no source to switch back to.
Why does a floating "no signal" box look so real?
Because it is what many modern TVs and monitors show when an input goes quiet: a black screen with a small message drifting around. People see it whenever a cable works loose or a box is switched off, so their first thought is the hardware, not a web page.
Will it damage the screen?
It should not. Most of the screen is black and the badge keeps moving, which is close to the opposite of a fixed logo sitting in one place for hours, the usual cause of burn-in on OLED sets.
Can I use it as a video or stream effect?
Yes. Go fullscreen and screen-capture the tab in OBS for a signal-loss transition, or point a camera at the screen for a practical shot. It loops indefinitely, so you can grab as much footage as you need.
How do I stop it?
Press Esc or close the tab. If you cast it to a TV, stopping the cast ends it, and the set returns to whatever input it was on before.
I just want a plain black screen for the TV, not the no signal badge. Where is that?
That's a separate tool. See our plain Black Screen, useful for OLED battery saving and backlight-bleed checks.