Ashwin Lewis
If your second monitor is not waking up from sleep, there could be a few reasons. Firstly, check your cable connections and ensure that the video cable is plugged in properly. If your monitor is connected via VGA, try removing the connection and plugging it back in, as Windows 10 may not wake up this type of monitor. You could also try changing the BIOS settings by going to the Power tab and disabling the Hibernate like Soft OFF value. If you're using a laptop, you can try setting your PC to hibernate mode and then turning it back on again. If none of these solutions work, you may need to replace your monitor, as the issue could be due to a slow hardware failure.
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What You'll Learn
Check cable connections
If your second monitor is not waking up from sleep, one of the first things you should do is check your cable connections. This is often a simple fix, but it can be time-consuming to identify the exact cause of the problem.
First, ensure that the computer is not in standby or sleep mode by moving the mouse or pressing any key on the keyboard. If the computer is in sleep mode, press the power button to wake it up. If the monitor still doesn't wake up, disconnect and reconnect the video cable. Try using a different cable or port to see if that resolves the issue. For example, if you're using an HDMI cable, try switching to a DVI cable, or vice versa. You can also try unplugging the cable from the monitor and plugging it back in, or disconnecting the second monitor and plugging it in after the main monitor has booted up.
If you're using a VGA cable, you may need to remove the connection altogether. VGA cables have been known to cause issues with dual monitor setups in Windows 10, and using converters or adapters may not solve the problem. Try using a different type of cable, such as DVI or HDMI, if possible.
In some cases, the issue may be related to the power settings on your computer. Open the Device Manager and find the Mouse dropdown menu. Click on Mouse, then select Properties and the Power Management tab. Here, you can uncheck the option "Allow the computer to turn off the device to save power" and make sure "Allow the device to wake the computer" is checked. Repeat these steps for the keyboard as well.
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Change power settings
If your second monitor is not waking up from sleep, you may need to change some power settings on your computer. Here are the steps you can follow:
- Check your cable connections: Ensure that the video cable connecting your second monitor to your computer is plugged in properly. Try disconnecting and reconnecting the cable. If you have a VGA cable, you may need to remove it and use a different type of connection, such as DVI or HDMI, as some users have reported issues with VGA cables not working after their computers wake up from sleep mode.
- Open Device Manager: Go to your computer's Device Manager and find the Mouse drop-down menu. Click on Mouse and then select Properties. Go to the Power Management tab and make the following changes:
- Uncheck the option "Allow the computer to turn off the device to save power".
- Check the option "Allow the device to wake the computer".
- Check USB port settings: If the above steps do not work, go to the Human Interface Devices in Device Manager and check the "Allow this device to wake the computer" option for every USB port.
- Change advanced power settings: On your keyboard, press the Windows key + X and select Control Panel. Navigate to Hardware and Sound, then click on Power Options. Click on Change plan settings for your current plan. Click on Change advanced power settings and locate the "USB settings" and "USB selective suspend setting". Disable the USB selective suspend setting and click OK to apply the changes.
- Disable "Hibernate like Soft OFF": If you are still having issues, try changing the BIOS settings. Go to the Power tab in the BIOS and change the "Hibernate like Soft OFF" value to disabled.
- Disable Deep Sleep/Hibernate: If your monitor has a "Deep Sleep" or Hibernate mode, you can try disabling this setting through the monitor's OSD (On-Screen Display) menu.
By following these steps and changing the relevant power settings, you should be able to wake up your second monitor from sleep mode.
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Update Windows
If your second monitor is not waking up from sleep, there are several fixes you can try. Firstly, check if your computer is in sleep mode by moving the mouse or pressing any key on the keyboard. If this does not wake the monitor, press the power button on the computer.
If the issue persists, ensure that the video cable is plugged in properly and reconnect it if necessary. If you are using a VGA cable, try removing it as this has been known to cause issues with Windows 10 and 11. You can also try switching the cables that are connected to your monitors, as the problem may be related to the monitor with a lower resolution being assigned the number one position.
If you are still experiencing issues, you can try disabling the auto-detect feature in your monitor settings. This can be done by going to the Power Management tab in your mouse settings and checking "Allow this device to wake the computer".
Additionally, you can try reinstalling your graphics card drivers to fix any bugs and update them to the latest version. To do this, open Device Manager, click on Display adapters, right-click on your graphics card name, and select Uninstall Device. Then, reboot your computer and check for Windows updates.
If none of these solutions work, you may need to restart your computer or update your hardware.
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Change BIOS settings
If you are facing issues with your second monitor not waking up from sleep, you can try changing your BIOS settings. Here are the steps you can follow:
First, boot into your BIOS/UEFI settings during startup. This can usually be done by pressing F2, Delete, or Esc, depending on your motherboard. Once you are in the BIOS/UEFI settings, navigate to the Power tab. Here, you will need to change the "Hibernate like Soft OFF" value to disabled. This setting can cause issues with the second monitor not waking up from sleep mode.
Additionally, you can also try adjusting the multiple displays setting. If it is set to "PC screen only," change it to "Extend these displays" or "Duplicate these displays." This can help wake up the second monitor.
It is also important to ensure that your BIOS settings related to display configuration are set correctly. Incorrect display configurations can create conflicts and result in a non-responsive monitor.
By making these changes in your BIOS settings, you can try to resolve the issue of your second monitor not waking up from sleep. If you are unsure about any settings, it is recommended to seek assistance from technical support to avoid any potential issues.
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Check for hardware failure
If your second monitor is not waking up from sleep, it could be due to a hardware failure. Here are some steps to check for hardware failure and try to resolve the issue:
Check the Cables
Firstly, check the cables connecting your monitors to your computer and power source. Ensure that the cables are securely plugged in and not damaged or loose. Try unplugging and replugging the cables to ensure a proper connection. You can also try using a different cable or a different port to see if that resolves the issue.
Monitor Settings
Incorrect monitor settings could also be the culprit. Check the resolution, brightness, contrast, colour, and refresh rate settings on your monitor and computer. Adjust these settings to match your monitor's specifications and preferences. Resetting your monitor to its factory default settings may also help.
Graphics Card and Drivers
The issue could be related to your graphics card or outdated, corrupted, or incompatible drivers. Check your graphics card and ensure that its drivers are up to date. Update any outdated drivers and check if that resolves the problem.
Hardware Components
If the above steps do not work, carefully inspect your monitor for any physical damage, such as cracks, dents, scratches, or signs of overheating. Gently tap or shake your monitor to check for any loose parts or rattling noises, which could indicate a hardware malfunction.
If you suspect a hardware problem, it is recommended to contact the manufacturer or a qualified technician for further assistance, as attempting to open or repair the monitor yourself may void warranties or cause further damage.
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