After you turn on your computer, you see a “No Signal” message on your Viewsonic monitor. What’s happening? Don’t worry. The possible fixes are listed below for you to fix the problem.
You can try these 5 fixes to fix the problem:
Fix 1: Check your video cable
A loose cable or a damaged cable probably can cause you to get the monitor “No Signal” issue. So to troubleshoot, let’s start by checking your video cable.
Check to ensure your video cable is firmly seated
If you’re not sure if it’s seated firmly, you can unplug and then re-plug the cable to ensure it’s seated firmly.
1) Turn off your computer and your Viewsonic monitor.
2) Unplug the video cable from both the monitor end and the computer end.
3) Wait a few minutes, for example, five minutes.
4) Re-plug the video cable to both the monitor end and the computer end. Important: Make sure the cable is seated firmly at both ends.
5) Turn on your computer and your Viewsonic monitor.
Test your video cable on another PC
If possible, you can test your video cable on another PC. If it doesn’t work on another PC either, the cable is probably damaged.
Test with a new video cable
You can also test with a new video cable to figure out if the current video cable is the cause.
After you check the video cable, if the issue still remains, check the output ports. See Fix 2.
Fix 2: Check the output ports
The output port you’re currently using can be damaged. So the second step you can do is to check the output ports.
Try a different output port
If you have more than one same type of output port on your computer, for example, two HDMI ports, switch to other ports to see if the “No Signal” message on the monitor disappears. If the monitor works with another port, then you’ll know your current port is the cause.
You can also try a different type of output port to troubleshoot if your current port is the cause. Note you’ll need to use a different type of video cable for troubleshooting.
If you’re using a dedicated graphics card:
Unplug the video cable from the port on your dedicated graphics card and then plug it into the port on your motherboard. After that, see if the issue disappears.
How to verify the motherboard ports and the graphics card ports? Usually, graphics card ports are horizontal and motherboard ports are vertical. For modern computers, motherboard ports usually sit above the graphics card ports.
Fix 3: Check your monitor
There’s a chance that your monitor is damaged. Try to connect your monitor with a different computer like your laptop.
By connecting with a different computer, if your monitor works without the “No Signal” error message. It indicates your monitor is working fine. If your monitor still displays the “No Signal” message, your monitor could be damaged.
Fix 4: Check computer hardware
Open your machine, check the following hardware and ensure they’re seated properly and firmly in the slot. You can unplug the hardware and then re-plug the hardware to make them seat properly.
- Graphics Card (if supported)
If you have difficulties doing this on your own, it’s recommended you take your computer to a reputable local professional for further support.
Fix 5: Check the input source
Check to ensure the input source is selected correctly. If the monitor is using an incorrect input source, it’ll display the “No Signal” message on the screen.
Press the Menu button at the bottom of your monitor then use the narrow keys to navigate to Input Source. There, you can see if the input source is selected correctly. For example, if you connect the monitor through an HDMI cable, the Input Source on the monitor needs to be set as HDMI.
If the input source is selected incorrectly, just switch it to the correct one.
Hopefully you find this post helpful. If you have any questions, feel free to drop a comment below. I’ll get back to you ASAP.