To fix a “No Signal” error on your ASUS monitor when you connect it to your PC via HDMI, check the input source selected in the monitor’s settings.
Most latest ASUS monitors come with multiple HDMI ports, and they are numbered.
If your monitor has multiple HDMI ports, ensure that the correct port is selected as input source.
For example, if your monitor has 2 HDMI ports, and you have connected the cable to the 2nd port, then you must select HDMI 2 in the input settings.
To select the HDMI input on your ASUS monitor, press the Menu button or use the joystick control if your monitor has one.
From the OSD menu, scroll down and choose Input Select. Then, select HDMI. See the screenshot below:
Reset HDMI Connection
If correct input source is selected, but the screen is screen blank, reset the HDMI connection to your ASUS monitor and PC. Here’s how to do that:
- Turn Off your ASUS Monitor.
- Next, disconnect the HDMI cable from both your computer and the monitor.
- Wait for about 7-10 seconds, and then plug it back again.
- Now turn it On again.
If this doesn’t work, follow it up by power cycling your monitor. Here’s how to do that:
- To do that, unplug all the cables from your monitor.
- Press and hold the Power button on the monitor for 15 seconds.
- Wait for 1 minute, and then plug it back in.
If you still have trouble, check the HDMI cable, and factory reset your ASUS monitor.
If you are using your ASUS monitor as a secondary display with your laptop, try manually detecting it in Windows settings, and updating your laptop GPU drivers.
Check HDMI Cable
If resetting the HDMI cable connection and confirming the input source did not fix your ASUS monitor signal issue, then your HDMI cable might be faulty.
Check both ends of the HDMI cable for any damages.
Inspect the power cable of your monitor. If it is damaged, it won’t provide enough power to the monitor to work properly.
Factory Reset ASUS Monitor
Another quick workaround is to reset your ASUS monitor. Here’s how to do that:
- Press the menu button on your monitor. This will bring up the on-screen menu.
- Go to settings and scroll down till you see the All Reset or Factory Reset option.
- Select it and your Asus monitor should be restored to default factory settings.
Manully Detect Display
This step only applies if you are using your ASUS monitor as a second display with a laptop or a computer.
Here’s how to do that:
- Open Settings by pressing Windows and I keys on the keyboard.
- In Settings, click on System, and then select Display option in right pane. See the screenshot below:
- Under Multiple displays option, click on Detect button to manually detect the display. See the screenshot below:
Update GPU Driver
Again, this step only applies if you are using your ASUS monitor as a second display with a laptop or a computer.
Here’s how to update graphics card drivers in Windows 10 or Windows 11:
- Open Windows Run using Windows + R keys on the keyboard.
- Type devmgmt.msc and press Enter.
This will open up Windows Device Manager.
- Expand the Display adapters section.
- Right-click on your display driver and choose Update Driver.
- Select Search automatically for the driver option.
Once your graphics card drivers are updated, restart your computer and check if your ASUS monitor is now working as it should.
Got any question or query? Feel free to ask me!