Input Signal Not Found HP Monitor: Reason and Solutions

input signal not found hp monitor

Last Updated on July 17, 2023 by Easyapns

Encountering the “Input Signal Not Found” error on an HP monitor can be frustrating, especially when you cannot see any display. This error typically indicates that the monitor is not receiving the correct input signal, and it often comes with the accompanying message to check the video cable and video source. Several factors can contribute to this error, including loose or damaged cable connections, incorrect input source selection, graphics card or RAM issues, corrupted drivers or firmware, and even a damaged monitor or other hardware components.

This guide will explore various troubleshooting steps to help you resolve the “Input Signal Not Found” error on your HP monitor. Following these steps, you can restore your monitor’s functionality and enjoy a clear, uninterrupted display.

Top 5 Reasons to Input Signal Not Found on HP Monitor

The “Input Signal Not Found” error on an HP monitor can occur for several reasons. Here are some common causes:

#1. Incorrect input source selection: If the monitor is set to the wrong input source, it may not receive a signal from the connected device. Make sure you have selected the correct input source (e.g., HDMI, VGA, DisplayPort) using the monitor’s OSD menu.

#2. Loose or damaged cable connections: Faulty or loosely connected video cables between the monitor and the computer can result in signal loss. Ensure that the cables are securely plugged into the monitor and the computer.

#3. Damaged video cables or ports: If the video cable or port on either the monitor or the computer is damaged, it can prevent the signal from being transmitted properly. Inspect the cables and ports for any visible damage.

#4. Graphics card or RAM issues: Problems with the graphics card or RAM can interfere with the signal output to the monitor. Ensure the graphics card is properly seated in its slot, and the RAM sticks are securely inserted.

#5. Outdated or corrupted drivers: Incompatible or outdated display drivers can cause communication issues between the computer and the monitor, leading to the “Input Signal Not Found” error. Update the display drivers for your graphics card to the latest version.

9 Ways to Fix Input Signal Not Found HP Monitor Error

Here are some steps you can try to resolve the issue:

#1. Power cycle your monitor and PC:

Turn off your monitor and computer, unplug them from the power source, wait for a few minutes, and then plug them back in and turn them on. This can help reset any firmware bugs that might be causing the problem.

#2. Check the input source:

Make sure you have selected the correct input source on your monitor. Many monitors have multiple video input ports, such as VGA, HDMI, or DisplayPort. Use the monitor’s on-screen display (OSD) menu to select the interface you use for the connection.

#3. Check for damaged cables and ports:

Inspect the video cables and connectors for any signs of damage. Ensure that they are securely connected to both the monitor and the computer. Try using a different cable or port to see if the issue persists.

#4. Reseat the video card and RAM:

If the problem continues, it could be due to improperly seated hardware components like the video card or RAM. Shut down your computer, unplug all cables, open the computer case, and reseat the video card and RAM sticks, ensuring they are properly aligned and secured in their slots.

#5. Update monitor and display drivers:

Outdated or corrupted monitor or display drivers can cause compatibility issues and trigger the “Input Signal Not Found” error. Update the drivers by accessing the Device Manager in your operating system and selecting the appropriate driver for your monitor. You can also update the graphics card drivers.

#6. Update monitor firmware:

Outdated firmware can also cause communication problems between the monitor and the computer. If available, download and install the latest firmware for your HP monitor using the HP Display Center software or any other recommended method provided by HP.

#7. Adjust screen resolution and refresh rate:

Incorrect screen resolution or refresh rate settings can cause compatibility issues with the monitor. Access the display settings on your computer and ensure that the resolution and refresh rate are set to values supported by your monitor.

#8. Reset or update the BIOS:

Improper BIOS settings can sometimes lead to the “Input Signal Not Found” error. Resetting the BIOS to its default settings can help resolve this issue. If resetting the BIOS doesn’t work, consider updating the BIOS to the latest version provided by HP. Follow the instructions provided by HP for your specific computer model.

#9. Identify and replace damaged components:

If none of the above solutions work and the issue persists when connecting your monitor to a different computer or using a different monitor with your computer, there may be hardware damage. You may need to replace the damaged components, such as the monitor, graphics card, RAM, or motherboard.



Encountering the “Input Signal Not Found” error on an HP monitor can be resolved through various troubleshooting steps. By verifying the correct input source, checking cables and ports, reseating graphics cards and RAM, updating drivers and firmware, adjusting screen resolution and refresh rate, and resetting or updating the BIOS, you can effectively resolve this error and restore proper function to your HP monitor. If hardware damage is identified as the cause, replacing the damaged components may be necessary. With these troubleshooting techniques, you can regain a clear, uninterrupted display on your HP monitor.