No HDMI Output
Raspberry Pi Single-Board Computer
Severity:What Does This Error Mean?
Raspberry Pi with no HDMI output is most often caused by the Pi initializing before the monitor is powered on. Add hdmi_force_hotplug=1 to /boot/firmware/config.txt (or /boot/config.txt on older OS versions) to force HDMI output regardless of monitor state.
Affected Models
- Raspberry Pi 5
- Raspberry Pi 4B
- Raspberry Pi 3B+
- Raspberry Pi Zero 2 W
- Raspberry Pi 400
Common Causes
- Monitor powered on after the Pi — HDMI not detected during boot
- hdmi_force_hotplug not set in config.txt
- Using a HDMI-to-DVI or HDMI-to-VGA adapter without the correct config settings
- Micro-HDMI cable loose or partially inserted (Pi 4 and Pi 5)
- Display resolution set higher than the monitor supports