Gina Johnson
If your external monitor is not waking up from sleep mode, there are several troubleshooting steps you can take. First, check that your computer is not in sleep mode by moving the mouse or pressing any key on the keyboard. Next, ensure that all cables connecting your monitor to the computer are securely plugged in and try disconnecting and reconnecting the video cable. You can also try updating your graphics drivers and disabling the USB selective suspend setting in your power options. If you're using a Windows 10 computer, you may need to change the BIOS settings by going to the Power tab and disabling the Hibernate like Soft OFF value. If none of these solutions work, you may need to seek help from a technician or your manufacturer's support team.
How to wake up a sleeping external monitor
| Characteristics | Values |
|---|---|
| Check the signal source | Ensure the computer is not in standby or sleep mode by moving the mouse or pressing any key on the keyboard |
| Check the video cable | Disconnect and reconnect the video cable if it is not plugged in properly |
| Restart the computer | Press the power button of the computer to wake it up from sleep mode |
| Check monitor connections | Ensure all cables connecting the monitor to the PC are securely plugged in |
| Verify monitor input source | Manually select the correct input source (e.g. HDMI, DisplayPort) that the PC is connected to |
| Check for Windows updates | Ensure the Windows operating system is up to date with the latest updates and patches |
| Test with a different monitor/cable | Try connecting the PC to a different monitor and use a different cable |
| Disable sleep mode temporarily | Set the power plan to "High Performance" or "Balanced" without sleep mode enabled |
| Update graphics drivers | Visit the website of your GPU manufacturer (NVIDIA or AMD) and download the latest graphics drivers for your GPU model |
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What You'll Learn
Check monitor connections
If your external monitor is not waking up from sleep mode, you should first check the monitor connections to ensure that all cables connecting your monitor to the computer are securely plugged in at both ends. If you are using an HDMI, DisplayPort, or DVI cable, try reseating them.
If your monitor is still not waking up, it may be because your computer is in sleep mode. To check this, simply move your mouse or press any key on your keyboard. If this does not wake your computer, press the power button.
If your computer is not in sleep mode, or waking it up does not solve the issue, you should check if the video cable is plugged in properly. Disconnect and reconnect the video cable if necessary.
If you are using a laptop with dual monitors, try unplugging the VGA cable from your laptop. If this wakes up the laptop screen, plug the VGA cable back in, and your second screen should also wake up.
If none of these solutions work, there may be a more complex issue related to hardware compatibility, drivers, or firmware. In this case, it is advisable to seek help from a qualified technician or your manufacturer's support team.
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Verify monitor input source
Verifying your monitor's input source can be done through various quick and simple methods. Here are some ways to do it:
Using the On-Screen Display (OSD) Menu
The OSD menu is a convenient way to check and change the monitor's input source without accessing additional settings. To verify the input source:
- Access the OSD menu on your monitor.
- Navigate to the "Input Source" or similar options.
- Check the current input source selection.
- If needed, switch to the desired input source using the menu options.
Physical Connection Inspection
This method involves physically checking the cables and connections between your monitor and the connected device, such as a computer.
- Ensure that all necessary cables (e.g., HDMI, DisplayPort, VGA) are securely connected to both your monitor and the device.
- Follow the cable from the monitor to the respective port on the connected device.
- If using multiple monitors, verify that each one is connected to the correct input source.
Display Settings on Windows
If you're using a Windows operating system, you can check the input source through the display settings:
- Right-click on your desktop and select "Display Settings" from the context menu.
- Alternatively, go to the "Settings" app, select "System," and then choose "Display."
- In the "Display Settings" window, scroll down to the "Multiple Displays" section.
- Click on the drop-down menu below the label of your monitor to view and change the input source.
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If you're using Ubuntu, you can change the input source using command-line instructions. For example, the command "ddccontrol" is used to switch between input sources, but use it with caution as it can be risky.
Remember that verifying and changing the input source is generally a straightforward task, and modern monitors often have user-friendly features to simplify this process.
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Update graphics drivers
Updating your graphics drivers is an important part of regular PC maintenance. Without updates, your computer is more vulnerable to malware, corrupt file systems, and maximum disk usage that saps performance.
Windows
To update your graphics drivers on Windows, you can use the Windows Device Manager. Here's how:
- Press the Windows logo key and the R key simultaneously to open a Run box.
- Type "devmgmt.msc" and then hit Enter or click OK.
- In the dropdown menu, expand "Display adapters".
- Right-click on your GPU and select "Properties".
- Click on "Search automatically for drivers".
- Windows will search for and install the best available driver.
- If Windows can't find a newer release, go to the manufacturer's website or try Windows Update.
You can also update your graphics drivers on Windows by visiting the official driver webpages of the three major graphics driver makers: Intel, NVIDIA, and AMD. Download the drivers and install them using the setup file or the manual driver method.
MacOS
Apple tightly controls the components of its products and mainly makes driver changes through OS updates rather than individual packages. So, to update your graphics drivers on MacOS, make sure your software is up to date. Apple may also release small updates to address glitches. So long as Software Update reports no new updates, you will be running the latest drivers available for your Mac.
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Check for Windows updates
If you are having issues with your external monitor, one of the first things you should do is check for Windows updates. Keeping your Windows operating system up to date is important, as Microsoft often releases updates that fix sleep-related issues.
To check for Windows updates, follow these steps:
- Open the Start menu by clicking the Windows logo in the bottom-left corner of your screen.
- Click on "Settings," which is the gear-shaped icon.
- In the Settings window, click on "Update & Security."
- In the Update & Security section, click on "Check for Updates."
- Windows will then check for any available updates and list them out. If there are any updates available, you will see an option to "Download and install" them. Click on that option to begin the update process.
- Once the updates are installed, restart your computer for the changes to take effect.
It is recommended to keep automatic updates turned on in Windows to ensure your system stays up to date. This can be done by going to Settings > Update & Security > Windows Update, and then selecting "Automatic Updates." With automatic updates enabled, Windows will automatically download and install important updates as they become available.
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Disable sleep mode
Sleep mode is a power-saving state that stops all actions on a computer. It moves any open documents and applications to the system memory (RAM) and puts the computer into a low-power state. This can be an issue if you are using an external monitor, as the computer may enter sleep mode when you are inactive for too long, even if you are watching something on the external display.
To disable sleep mode when an external display is connected, you will need to create two power plans in Windows and find their GUIDs. You will also need to run an AutoHotKey script. Firstly, create two power plans, one that disables sleep when the lid is closed and one that does not. You can do this by opening the Notepad application and pasting in the following code:
OnMessage(0x219, "MsgMonitor")
MsgMonitor(wParam, lParam, msg)
{
SysGet, MonitorCount, MonitorCount
SysGet, MonitorPrimary, MonitorPrimary
Count := 0
Loop, %MonitorCount%
{
Count++
}
IfLessOrEqual, count, 1
Run, powercfg /s c7046c63-d4a3-4246-910c-c994cd704433 /* no external monitor power setting */
Else
Run, powercfg /s 3791f438-87b9-4243-89a1-00c797e02c84 /* external monitor connected */
}
Save the file with the AHK file extension and run it with AutoHotKey. You can now manually run this script whenever you connect an external monitor, or you can add it to your startup items so that it always runs.
Another option is to turn off 'Close lid to sleep' when only connected to a dock or monitor. To do this, go to Start > Settings > System > Power & Battery > Screen, sleep, & hibernate timeouts. Here, you can adjust how long your device waits before turning off the screen and going to sleep. Make sure that 'Turn off the display' and 'Put the computer to sleep' are set to values appropriate for your usage.
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Frequently asked questions
Try moving your mouse or pressing any key on your keyboard. If this doesn't work, check that your computer is not in sleep mode and that the video cable is plugged in properly. Disconnect and reconnect the video cable if necessary.
Your monitor may not be waking up from sleep mode because it is not detecting a video signal from your computer. Check that your computer is not in sleep mode and that all cables are securely plugged in.
If you are using a Windows 10 laptop, try opening and closing the laptop screen. This should wake up the laptop and the external monitor.
To stop your monitor from going into sleep mode, you can disable sleep mode in your power settings.
Try changing the BIOS settings by going to the Power tab and disabling the "Hibernate like Soft OFF" value.
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