Troubleshooting 'Input Signal Not Found HDMI' Error: A Comprehensive Guide
The message ‘input signal not found HDMI check the video cable and video source’ typically indicates that your monitor or TV is not receiving a signal from your computer through the HDMI connection. Here are some steps you can take to troubleshoot and fix the issue:
1. Check the HDMI Connection
Ensure the Cable is Secure
Make sure that both ends of the HDMI cable are securely connected—one to your computer and the other to your monitor or TV. Loose connections can cause signal interference and lead to the ‘input signal not found’ message. If the cable seems loose, try tightening it or reinserting it.
Try a Different HDMI Port
If your monitor or TV has multiple HDMI ports, try plugging the cable into a different port. Sometimes a loose connection in one port might be causing the issue, or the cable might not be compatible with that port.
2. Inspect the HDMI Cable
Check for Damage
Look for any visible damage to the HDMI cable. If you have another HDMI cable available, try using that to see if the issue persists. Signs of damage can include frayed wires, broken pins, or visible kinks in the cable.
3. Select the Correct Input Source
Change Input Source
Use the remote control or buttons on your monitor/TV to ensure that the correct HDMI input source is selected. Sometimes the device might be set to a different input. Refer to your monitor or TV’s user manual for how to switch inputs.
4. Restart Devices
Reboot Your Computer
A simple restart can resolve connection issues. Ensure that your system is free of temporary glitches or bugs that might be causing the problem. Follow the steps in your computer’s user manual to restart it.
Power Cycle Your Monitor/TV
Turn off your monitor or TV, unplug it from the power source, wait a minute, then plug it back in and turn it on. A power cycle can help refresh the device and fix any temporary software bugs or hardware issues.
5. Update Display Drivers
Check for Driver Updates
Ensure that your graphics drivers are up to date. You can do this through the device manager on your computer or by visiting the manufacturer’s website. Old or incompatible drivers can sometimes cause connection issues. Follow the manufacturer’s instructions to update your drivers.
6. Test with Another Device
Connect Another Device
If possible, connect another device like a gaming console or another computer to the same HDMI port to see if it works. This can help determine if the issue lies with the monitor/TV or the computer. If the other device works, the problem is likely with your computer or the HDMI port on the computer.
7. Check Display Settings
Windows Display Settings
If you’re using Windows, right-click on the desktop and select 'Display settings'. Check that the correct resolution and color settings are selected. Incorrect settings can cause the ‘input signal not found’ message.
Mac Display Settings
If you’re on a Mac, go to 'System Preferences' > 'Displays' and verify that the correct resolution and clamshell mode are selected. Incorrect settings can also cause the issue.
8. Try Safe Mode or BIOS
Boot in Safe Mode
If you suspect a software issue, try booting your computer in Safe Mode. Safe Mode runs only essential drivers and software and can help identify if a software conflict is causing the problem. To enter Safe Mode, restart your computer and hold down the Shift key while booting. If the screen turns black or the message ‘Safe Mode’ appears, you can troubleshoot the issue there. Refer to your computer’s user manual for instructions.
Check BIOS Display
Restart your computer and enter the BIOS setup, usually by pressing F2, F10, DEL, or ESC during boot. If you see the BIOS screen, it indicates that the issue is likely with your operating system or drivers. However, if the display is completely black, the problem might be with the computer’s graphics card or the monitor.
If You've Tried All These Steps and Are Still Having Issues
There may be a hardware problem with either the HDMI port on your computer or the monitor/TV itself. In such cases, you may need to replace or repair the faulty component. Consider consulting a professional technician or reaching out to the manufacturer for support.