Raspberry Pi “Zero”: HDMI Monitors Has NO SIGNAL

Raspberry Pi Zero
www.pdf24.org    Send article as PDF   
When connecting a Raspberry Pi ‘Zero’ for the first time to a TV monitor with HDMI, and receive the message: “No Signal”. I tried it on several inputs and cables with no luck. Other devices work fine with the TV, and the cables so there can not be the problem. Then I tried a computer monitor with HDMI, also with no luck. What is happening?

I’ve investigated the problem for a couple of hours, before finding the solution.

The Raspberry Pi ‘Zero’ outputs a relatively weak HDMI Signal. Some devices may not immediately notice the Raspberry Pi ‘Zero’s HDMI Signal, or may not go through the negotiation process.

Setting the hdmi_force_hotplug=1 makes sure the Pi believes the Monitor/TV is really there. You might also need to set config_hdmi_boost=4 or even higher (up to 9) if your display needs a stronger signal.

If the display is a computer monitor, use hdmi_group=1 and if it is an older TV, try hdmi_group=2.

Do not set hdmi_safe=1 as that overrides many of the previous options.

Other things to look at are, using a shorter or better quality HDMI cable might help. Make sure your Pi’s power supply delivers 1A and not 500mA.

Suggested ‘config.txt’:

If you see a problem with the Red Colour – either absent, or interference,  might simply be that the Monitor requires a stronger signal than the Raspberry Pi ‘Zero’ can give.

Previous Post
Xbox Controller

Connecting 'Xbox Controllers' to the Raspberry Pi

If you have ever tried to use an Xbox controller with the Raspberry Pi, you will find very quickly that they do not work correctly right out of the box. ... Read more

Next Post
VLC media player

Compile VLC Player with Hardware Acceleration

Thanks to a post on the Raspberry Pi Foundation’s Message Board, where people have detailed the instructions on how to easily compile VLC Media Player with Hardware Acceleration. For this project, ... Read more

Short URL: http://tinyurl.com/y7xxeqkg

One Response to Raspberry Pi “Zero”: HDMI Monitors Has NO SIGNAL

  1. arclicious says:

    Thank you for posting a fix to this issue. I think that I’m speaking for all people who have just purchased a Raspberry Pi Zero and have never owned a Raspberry Pi before or have only used a bigger model of the Pi like the Pi 3: this page has prevented us from throwing the Pi into the trash and ordering a refund.If we had done that I am sure that we wouldn’t have purchased a Pi again and missed out on loads of awesome opportunies related to awesome projects like collecting weather data. I sincerely thank you for this solution.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.



Do NOT follow this link or you will be banned from the site!