Ashwin Lewis
If your computer monitor doesn't work when you wake your computer from sleep mode, there could be several reasons. The issue could be due to a cable connection, with some users reporting that unplugging the VGA cable or switching to a different input source (e.g. HDMI, DVI, or DP) resolved the issue. Another potential cause could be the power and sleep settings, which can be adjusted to prevent the monitor from entering standby mode. Additionally, it's recommended to check if the computer is in hibernation mode, as pressing the power button can wake it up.
Characteristics and Values
| Characteristics | Values |
|---|---|
| Computer monitor doesn't wake up from sleep mode | No signal issue |
| Monitor displays | "No signal" |
| Monitor connections | Loose cables |
| Monitor input source | Switch to a different input source |
| Computer sleep mode | Enters hibernation mode |
| VGA cable | Laptop screen wakes up |
| VGA connection | Windows 10 will "wake up" the Digital Monitor |
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What You'll Learn
Check monitor connections
If your monitor doesn't work when your computer wakes up from sleep mode, there are several troubleshooting steps you can take to identify and resolve the issue.
First, check your monitor connections. Ensure that all cables connecting your monitor to the computer are securely plugged in, both at the monitor end and the computer end. If you're using a laptop with dual monitors, try unplugging the VGA cable, as Windows 10 may not "wake up" VGA monitors. You can also try using different cables and converters, such as DVI to HDMI, mini DP to DVI, or DP to DVI, to see if that resolves the issue.
If your monitor continues to enter standby mode, you may need to change the power and sleep settings. Go to Start > Settings > System > Power & Battery > Screen and Sleep. Here, you can adjust how long your device waits before turning off the screen and going to sleep when not in use.
Additionally, verify your monitor input source. Sometimes, the monitor may switch to a different input source after waking up from sleep. Use the monitor's OSD (On-Screen Display) menu to manually select the correct input source, such as HDMI or DisplayPort, that matches your computer connection.
You can also try disabling sleep mode temporarily as a workaround. Set the power plan to "High Performance" or "Balanced" without sleep mode enabled to see if the problem persists.
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Verify monitor input source
If your monitor doesn't work when your computer wakes up from sleep mode, there are several potential causes and troubleshooting steps you can try.
One issue could be related to the sleep mode start-up. If your computer is in sleep mode for a long time, it will enter hibernation mode. To wake up your computer, simply press the power button. If the monitor continues to enter standby mode, change the power and sleep settings. Go to Start > Settings > System > Power & Battery > Screen and Sleep. Here, you can adjust the length of time before your device turns off the screen and goes to sleep when not in use.
Another potential cause could be a cable issue. Ensure that all cables connecting your monitor to the computer are securely plugged in on both ends. Check for any loose or damaged cables and replace them if necessary. If you have multiple monitors, make sure that each one is connected to the correct input source.
Additionally, the problem could be related to the monitor's input source. Sometimes, the monitor might switch to a different input source after waking up from sleep. Use the monitor's OSD (On-Screen Display) menu to manually select the correct input source (e.g., HDMI, DisplayPort, or VGA) that your computer is connected to. You can also verify the input source by checking the physical connections. Inspect the cables and connections linking your monitor to the computer, and ensure that all necessary cables are securely connected on both the monitor and the computer end.
For Windows operating systems, you can also check the input source through the display settings. Right-click on your desktop and select "Display Settings" from the context menu. In the Display settings window, scroll down to the "Multiple displays" section, where you will find the name of your monitor(s). To check the input source of a particular monitor, click on the drop-down menu below its label.
If you are still encountering issues, you may need to restart both your monitor and the connected device to refresh their settings and connections. Additionally, updating the graphics driver on your computer may help, as outdated drivers can cause input source problems.
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Change power and sleep settings
If you're having issues with your monitor not working after your computer awakes from sleep mode, there are several things you can try. Firstly, check if the issue is related to sleep mode start-up and try changing from sleep to hibernation mode. If you're using a dual-monitor setup, the problem could be related to the use of a VGA cable; try removing this and using an HDMI, DVI, or DP connection instead.
Additionally, you can try adjusting your power and sleep settings. Here are some instructions for doing so on both Windows and Mac systems:
Windows:
- Select "Search" on the taskbar, type "Control Panel", and select it from the results.
- Select "System and Security".
- In the "Power Options" section, select "Change what the power buttons do".
- Select "Change settings that are currently unavailable".
- Under Screen and sleep, adjust the settings according to your preferences. You can select how long you want your device to wait before turning off the screen and going to sleep when you're not using it.
- If you want to enable hibernation mode, go to the Shutdown settings section and select the "Hibernate" checkbox. Then, select "Save changes".
Mac:
- Go to System Settings and select Battery.
- Click on Options.
- From here, you can adjust various sleep and wake settings. For example, you can choose to wake your Mac for network access on battery, power adapter, or never.
- You can also enable "Prevent automatic sleeping on power adapter when the display is off" to keep your Mac awake when it's plugged in and the display is off.
- If you want to adjust the automatic sleep time, click on the drop-down menu next to "Turn display off when inactive" or "Turn display off on battery when inactive" and choose your preferred duration (from 1 minute up to 3 hours) or select "Never".
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Check for cable issues
If your monitor doesn't work after your computer wakes up from sleep mode, there could be several reasons for this issue. Here are some troubleshooting steps to identify and resolve the problem related to cable issues:
Check Monitor Connections:
First, ensure that all cables connecting your monitor to the computer are securely plugged in at both the monitor end and the computer end. If you're using HDMI, DisplayPort, or DVI cables, try unplugging and replugging them.
Verify Monitor Input Source:
Sometimes, the monitor might switch to a different input source after waking up from sleep mode. Use the monitor's OSD (On-Screen Display) menu to manually select the correct input source (e.g., HDMI, DisplayPort) that matches your computer connection.
Test with a Different Monitor/Cable:
If possible, try connecting your computer to a different monitor and use an alternate cable. This will help determine if the problem is related to your original monitor or cable.
Update Graphics Card Driver:
The issue could be related to graphics card driver corruption. Try updating the graphics card driver on your computer. If updating doesn't help, you can try uninstalling the driver, and then downloading and installing the best compatible driver from the computer manufacturer's website.
Check for Windows Updates:
Ensure that your Windows operating system is up to date. Microsoft occasionally releases updates that fix sleep-related issues.
Disable Sleep Mode Temporarily:
As a temporary solution, you can disable sleep mode to see if the issue persists. Set the power plan to "High Performance" or "Balanced" without sleep mode enabled.
If none of these cable-related troubleshooting steps work, there might be a more complex issue, and it is advisable to seek assistance from a qualified technician or your manufacturer's support team.
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Change from sleep to hibernation mode
If your computer monitor doesn't work when your computer wakes up from sleep mode, there are several troubleshooting steps you can take to identify and resolve the issue. Firstly, check your monitor connections and ensure that all cables connecting your monitor to the computer are securely plugged in at both ends. If you're using multiple monitors, the issue could be related to the type of cable connecting your monitors to the computer. For instance, Windows 10 may "wake up" a Digital Monitor (HDMI/DVI/DP) but not a VGA cable. In such cases, removing the VGA connection and using an alternative cable type may resolve the issue.
If the above steps don't work, you can try changing from sleep to hibernation mode. Hibernation mode saves your computer's current state to the hard drive, storing the contents of its memory to a file. When you power your computer back on, it restores its previous state from the hard drive to memory, allowing you to resume from where you left off. To enable hibernation mode on your Windows PC, follow these steps:
- Select "Search" on the taskbar, type "Control Panel", and select it from the results.
- Select "System and Security".
- In the "Power Options" section, select "Change what the power buttons do".
- Select "Change settings that are currently unavailable".
- In the "Shutdown settings" section, select the "Hibernate" checkbox.
- Select "Save changes".
Now that you've enabled hibernation mode, you can hibernate your PC by selecting "Start", then "Power", and finally "Hibernate". Alternatively, you can press the Windows logo key + X on your keyboard, then select "Shut down or sign out" followed by "Hibernate".
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Frequently asked questions
There could be several reasons for this issue. Firstly, check that your computer is not in hibernation mode. If it is, press the power button to wake it up. Secondly, ensure that all cables connecting your monitor to the computer are securely plugged in at both ends. Another potential issue could be that your computer does not support the operating system.
Go to Start > Settings > System > Power & Battery > Screen and Sleep. Here, you can see the selected options for how long the device waits before turning the screen off and going to sleep when not in use.
If your monitor continues to enter standby mode, change the power and sleep settings. Additionally, verify the monitor input source and ensure it is set to the correct input source, such as HDMI or DisplayPort.
