All of a sudden, I received "Input signal not found" for my multiple monitor

[onecyntforu]

All of a sudden, I received "Input signal not found" for my multiple monitors. I thought it was the cable so I changed it. I purchased a new monitor and I still receive the same message. 

[Nal_NR]

Hi @onecyntforu,

Welcome to the HP Support Community. 

I'd be happy to help you! 

If you're receiving an "Input signal not found" message on your HP ENVY All-in-One - 32-a0014 across multiple monitors, even after changing the cable and trying a new monitor, the issue may be with the computer's output signal rather than the monitors or cables. Here are some steps to diagnose and potentially resolve the issue:

1. Check Basic Connections

• Ensure Proper Connections: Double-check that all cables are securely connected to the appropriate ports on both the HP ENVY All-in-One and the monitors.
• Try Different Ports: If your All-in-One has multiple video output ports (HDMI, DisplayPort, etc.), try connecting to a different port.

2. Power Cycle the System

• Restart the Computer: Power off your All-in-One completely, unplug it from the power source, wait a few minutes, and then plug it back in and power it on.
• Restart Monitors: Turn off the monitors, unplug them from the power source, wait a few minutes, then reconnect and power them back on.

3. Check Display Settings

• Use the Built-In Display: If the built-in display of your HP ENVY All-in-One is working, you can use it to check the display settings.
• Access Display Settings:
  1. Right-click on the desktop and select Display settings.
  2. Ensure that the external monitors are detected and configured correctly.
  3. If the monitors are not detected, try clicking on Detect to force Windows to look for connected monitors.

4. Update or Reinstall Graphics Drivers

• Update Drivers:
  1. Right-click on the Start menu and select Device Manager.
  2. Expand the Display adapters section.
  3. Right-click on your graphics adapter and choose Update driver.
  4. Select Search automatically for updated driver software.
• Reinstall Drivers:
  1. If updating doesn't work, you can uninstall the current drivers and reinstall them.
  2. After uninstalling, reboot your computer, and Windows should automatically reinstall the graphics driver.

Please find the remaining steps in the next post.

Hope this helps! Keep me posted for further assistance

Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.

[Nal_NR]

Hi @onecyntforu,

Please find the remaining steps below.

5. Check BIOS/UEFI Settings

• Access BIOS/UEFI: Restart your computer and press the appropriate key (often F10, F2, or Del) to enter the BIOS/UEFI settings.
• Check Video Output Settings: Ensure that the video output settings are correct and that the external video ports are enabled.

6. Test with a Different Device

• Test Monitors with Another Device: Connect the monitors to another device (like a laptop or another desktop) to ensure they are functioning correctly.
• Test with Another Cable: Even though you've changed cables, try using another one to rule out a faulty new cable.

7. Perform a System Restore (Optional)

• If the issue started after a recent update or software installation, consider performing a system restore to revert your system to a previous state when the monitors were working correctly.

8. Check for Hardware Issues

• Internal Hardware Check: If none of the above steps work, the issue might be related to the internal hardware, such as a problem with the GPU or motherboard. In such a case, professional repair or contacting HP support might be necessary.

If the problem persists after these steps, it might indicate a more serious hardware issue within the All-in-One, and repair might be required.

Hope this helps! Keep me posted for further assistance

Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.