8 Ways to Solve Input Signal Not Found HP Monitor on Windows

Does your HP monitor go blank and display "Input Signal Not Found" before going to sleep repeatedly? Typically, this error is followed by the warning, "Check the video cable and source." Thus, it is evident that the HP monitor is not receiving the proper input signal due to damaged video cables or source issues. Furthermore, it could be the result of underlying difficulties with monitor firmware or device drivers.

But don't worry, because we've explored eight trustworthy methods for resolving this ‘input signal not found HPmonitor’ error and restoring functionality.

Backup data before misfortune happens

‘Input signal not found HP monitor’ error is not rare, some other accidents happen from time to time to post a threat towards your data security. To improve your data security, you can utilize powerful backup software-AOMEI Backupper Standard.

• It offers full backup solutions, including system backup, disk backup, partition backup, file backup, and cloud backup.
• As its functionality, it is embedded with the Schedule Backup feature, which means that you can automatically backup computers with the Daily\Weekly\Monthly mode.
• It can support almost all storage devices recognized by Windows, including IDE, SATA, SCSI, SSD, USB external disks, hardware RAID, Network Attached Storage (NAS) and so on.

Then I will show you how to backup your important files. Before you execute, please download this software.

AOMEI Backupper

Best free Windows backup software for personal use.

Download Freeware
Windows 11/10/8.1/8/7

Now follow the instructions below:

1. In the left tab page, select Backup and then select Disk Backup.

2. Click Add Disk. Also, you can choose to rename this backup using the "Task Name" field to help you distinguish it from other backups.

3. In the popup window, select the source dis that you want to back up.

4. Click where the arrow points to select a destination path to store the image files. You can save files to external hard drives in case of system crashes.

5. Click the Start Backup button to begin your Samsung backup SSD in Windows 10.

What Causes “Input Signal Not Found” on HP Monitor?

Essentially, data cables (video cables) are responsible for transporting the input signal from the video adapter to the monitor. However, these signals may be lost during the process owing to a variety of circumstances, and you may receive messages such as "Input Signal Not Found" or "No Signal" even if your PC appears to be operating OK.

Regarding this, the following could be some of the key reasons why you're seeing the "Input signal not found" notice on your HP monitor:

• Loose or broken data cable connectors
• Selection of inappropriate input source
• The video card or RAM stick is not installed properly
• Corrupted driver or firmware
• The refresh rate of the display and PC are not synchronized
• Damaged monitor, RAM, graphics card, or motherboard

The reasons are diverse, and in order to troubleshoot the issue, here are a collection of solutions to do.

How to Fix “Input Signal Not Found” on HP Monitor

Before proceeding, we recommend power cycling your monitor and computer. This will eliminate any firmware problems that were causing input signal interruptions.

Similarly, if you just installed a dedicated graphics card instead of an integrated one, the motherboard will turn off the video output ports on the latter. So, if you connect the video cables to the motherboard's connector, your monitor will not receive any input signals. In such a case, connect them to the designated GPU ports, which should resolve the issue.

However, if you continue to receive the "Input Signal Not Found" warning, there may be other hardware or software issues. So, you can try the solutions listed below to wake up your monitor.

#1. Use the Right Input Source

Most current monitors include numerous video input connectors. Some versions offer VGA, HDMI, DisplayPort, or other interfaces, while others may have two HDMI connections.

To view your PC content on either monitor, you must first select the appropriate input source. For example, if you utilize a DisplayPort connection but the source is set to HDMI, your HP monitor may not recognize the HDMI and may display the "Input Signal Not Found" message. Similarly, using the first HDMI input port and setting the source to HDMI 2 could result in the same error.

Here’s a simple guide on how to use the correct input source on your HP monitor:

1. To bring up the On-Screen Display (OSD), press the dedicated button on your monitor. This could be found on the front, back, or bottom, according on the HP model. If you can't find it, we recommend looking in the monitor manual.

2. Now locate the Input Source section.

3. Next, select the interface you'll be utilizing to establish the monitor connection.

4. Wait a few seconds and your HP monitor should show the video output.

#2. Check for Damaged Cables and Ports

If the error notice appears even after using the correct source, there are likely problems with your video cable or port. When either is damaged, the monitor connection loosens often, causing the error message to appear again.

1. First, we recommend verifying the ports on both the PC case and the monitor. If you're utilizing the HP screen as a secondary monitor, make sure your laptop's video output port is working properly.

2. Typically, new displays and PCs include numerous HDMI ports. So, we recommend connecting the cable to a new port and seeing whether the problem persists. If your computer or monitor does not have an extra HDMI port, you can use a separate video cable.

#3. Reset Video Card and RAM Stick

If the input source is correct and there is no cable connection issue, the "input signal not found HP monitor" error may appear when there are problems with your visual card or RAM.

Essentially, the video card controls the output on your HP monitor, and if it is not properly placed, monitor faults can occur. Similarly, problems with Random Access Memory (RAM) will prohibit the PC from booting, as it will not get past the POST stage.

Thus, we recommend resetting these internal components, and here's how you may do it:

1. First, turn off your computer and unplug all the cables.

2. Then, use the dedicated button or unscrew the computer casing to remove it.

3. Now, put on an antistatic wrist strap and begin disconnecting any connections related to the GPU.

4. Next, remove the PCIe clip from its mounting bracket.

5. Now, carefully slide the graphics card from its appropriate slot.

6. Then clean both the graphics card and the slot.

7. Similarly, go to the RAM slot and unclip both clips that hold the stick in place.

8. Carefully remove it from the slot.

9. Next, use a brush to clean both the RAM slots and the stick.

10. Now, reseat the video card and RAM stick, making sure they are properly aligned.

11. Then, use the dedicated clips to secure them.

12. Finally, cover the PC casing and start your computer. The monitor should no longer display the signal fault.

#4. Update Monitor and Display Drivers

Another reason of the "HP monitor input signal not found" problem is an out-of-date monitor or display driver. Essentially, an old driver will prevent your PC from properly communicating with the monitor.

To avoid similar issues, we strongly advise you to check and update your drivers on a regular basis. However, this can be problematic because your display becomes entirely dark. So, before you face the monitor issue, you must first restart your computer and rapidly perform the steps outlined below:

1. Use the Instant Search tool to find and activate the Device Manager application.

2. Now, select Display Adapter and right-click the appropriate driver.

3. Select Update driver, which will open a new dialogue box.

4. Under 'How do you wish to look for drivers?', select the first option: Search automatically for drivers.

After updating the drivers, wait to see whether the monitor error occurs.If this happens, restart your computer and launch Device Manager again.This time, follow the procedures above for your monitor driver.

Note: You may also try enabling safe mode in networking mode to see if the monitor problem appears here. If it doesn't, you know that the major drivers aren't the problem.

#5. Update HP Monitor Firmware

Essentially, firmware provides the required instructions to guarantee that the monitor communicates effectively with the PC. However, if you haven't updated it in a long time, issues such as "HP input signal not found" can occur.

Well, HP provides dedicated software, the HP Display Center, to tune all display-related settings and easily upgrade the firmware. So, before proceeding with the next procedures, make sure you get it from the Microsoft store:

• Launch the app and navigate to the Advanced menu.
• Choose Firmware Update.

Wait until the update is complete before restarting your computer. This should resolve the signal error.

#6. Tweak Screen Resolution and Refresh Rate

If your monitor does not support the resolution or refresh rate transmitted by the video adapters, you may see the error "Input Signal Not Found". Thus, you can change these parameters as you did when replacing the faulty drivers:

1. Press Windows + I to open your HP monitor's Settings.Here, go to System >Display.

2. Expand the Displaydrop-down under Scale & Layout.Choose the recommended resolution.

3. Now, select the Advanced display setting.

4. Here, change the refresh rate to the highest available.

5. However, if you have two, three, or more monitors, you must first select your HP monitor.

6. Finally, wait to see if the issue appears again.

#7. Reset or Update HP BIOS

Another reason for the signal issue could be incorrect BIOS settings. So, it's preferable to reset the BIOS/UEFI, which should reinstate the system to the state where the notice never existed.

1. Restart your machine and enter the BIOS menu using the dedicated HP key (Esc) before booting into Windows.

2. Now, search for the Restore Defaults option and follow the on-screen directions.

3. After successfully resetting the BIOS, your computer should restart and the problem notice should no longer appear on the HP monitor.

4. If resetting does not work, please follow the steps outlined below to safely upgrade your BIOS.

• Enter the BIOS again.
• Find and select the Update System BIOSoption.
• Follow the on-screen directions to successfully update your BIOS.
• Now turn on your computer and see if the issue persists.

#8. Identify and Replace Damaged Monitor or PC Components

If none of the methods listed above work, your monitor or PC components (graphics card, RAM, or motherboard) are most likely damaged. To validate this, connect your HP display to a different computer. If the fault persists, it could be a problem with the display device, which you should consider replacing.

Similarly, you may try connecting a separate monitor to your present computer. If the same notice displays on the new display device, it means there are problems with the PC components.

In this scenario, you can use any of the following guides to upgrade or replace them:

• Upgrade your graphics card the right way.
• Install fresh RAM.
• Upgrade the motherboard.

In sum

After reading this post, you can get 8 ways to troubleshoot the ‘input signal not found HP monitor’ error. Additionally, if you are tired of trying methods one by one and need to get some important files withth your computer. Getting quick access from your previous backup is quite a good idea. AOMEI Backupper serves as an all-in-one backup and recovery software that enables you backup files to local/external, Share and NAS and other devices. Additionally, this tool grows as a powerful email backup software for Gmail, Yahoo! and so on. Don’t miss it now!