How to Fix ViewSonic Monitor No Signal Error

The No Signal error on ViewSonic monitor means that your monitor is not receiving video signal from your computer.

To fix it, power cycle your monitor. This will most probably resolve the issue.

First ensure that the correct input source is selected in the monitor settings.

If power cycling doesn’t work, factory reset your ViewSonic monitor.

Connect your computer or laptop to another monitor if available. If the problem persists on the other monitor as well, the issue is with your PC.

Check Input Source

Most latest ViewSonic monitors come with multiple ports such as HDMI, DisplayPort, and USB-C.

Make sure that the correct port is selected as the input source.

For example, if you have connected your PC or laptop through HDMI or DisplayPort to your ViewSonic Monitor, you must select the respective option as the input source setting.

To access the Input Source setting on your ViewSonic Monitor, press the Menu button on the monitor and then select the Input Select option.

Select your HDMI or DisplayPort (whichever video cable you are using). See the screenshot below:

The interface of your ViewSonic monitor OSD may vary slightly depending upon the monitor model. However, you will find Input Select option as soon as you open the OSD menu.

If the correct input source is selected and no signal problem persists, then try the quick fix explained below.

Power Cycle your ViewSonic Monitor

If you’re sure that you have selected the correct input source, and the monitor is still display no signal error, power cycle your monitor. This is a quick fix that has worked for many users is to simply power cycle your ViewSonic monitor.

Here’s how to do that:

  1. Turn off your monitor.
  2. Unplug all the cables from the monitor.
  3. Press and hold the power button on the monitor for 15 seconds.
  4. After 3 minutes, plug the montior back in, turn it On and then connect the video cable to the monitor.

Factory Reset your ViewSonic Monitor

If none of the above methods works, then it is highly likely that your ViewSonic monitor has misconfigured settings that are causing the no signal issue.

In that case, it is recommended to reset your ViewSonic monitor to restore factory settings. Here’s how to do that:

  1. Open your monitor On-Screen Menu (OSD).
  2. Navigate to Memory Recall option and select it.

This will reset your ViewSonic monitor to its default settings.


If you have tried each of these fixes and nothing has worked, I would recommend getting in touch with ViewSonic support.

About the Author

Muhammad Qasim

Muhammad Qasim

Muhammad Qasim is an Electrical Engineer, Solo Entrepreneur, and Web Developer who loves troubleshooting gadgets and making cool things for the internet.

You can contact him on Email, LinkedIn, Twitter, or GitHub.

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