Pc Monitor No Signal After Sleep

Pc Monitor No Signal After Sleep

A PC monitor can be a source of frustration when it fails to work. It is like the universe has gone silent, a vacuum of nothingness where once there was an image of productivity and efficiency.

When a monitor displays ‘no signal’ after sleep mode, the cause can range from minor technical issues to more serious hardware problems. Investigating these causes can help determine how best to address this issue.


In many cases, a computer monitor losing signal after sleep may be caused by an issue with the power settings. The computer may have been set to go into hibernation or standby mode instead of powering off completely.

This can cause the screen to lose its connection and result in no signal being detected. In addition, it could also indicate a problem with the cables connecting the display to the CPU or graphics card if they are damaged or not properly connected.

Another potential reason for a PC monitor having no signal after sleep might be related to outdated drivers on either the machine itself or those associated with its hardware components.

Faulty software can lead to issues such as this since it causes conflicts between components and prevents them from working correctly. To rectify this situation, users should ensure they have installed all necessary updates before attempting any other troubleshooting steps.

Finally, there may be some underlying hardware problems that need further investigation if none of these solutions resolve the issue. Users should check their BIOS version and make sure it corresponds to their system’s specifications, as well as investigate any defective components like RAM sticks that might be causing conflict within the system.

If these methods do not work, then seeking professional help would be advised.


To diagnose the issue, there are three key steps one should take:

1) Check all cables to ensure they are connected properly and securely.

The first solution involves checking for loose connections between the monitor and computer, as well as making sure all cables are securely connected. If any of these connections appear to be faulty or disconnected, reconnecting them should resolve the issue. Additionally, it is important to check whether the power cord from the monitor is plugged into an active outlet and if the display settings have been adjusted appropriately.

2) Examine the power supply cable to make sure it is providing sufficient voltage.

3) Ensure that display settings in Windows have not been changed inadvertently by pressing F8 on startup.

4) Updating or reinstalling drivers may also fix this type of issue. A driver update will replace outdated files with new ones designed specifically for newer operating systems and hardware components. Reinstalling drivers ensures that only up-to-date versions of necessary software are running on your system.

If all else fails, resetting both your PC and monitor could potentially solve this problem. Make sure to back up any important data before performing either procedure so that nothing gets lost during the process.

If these basic steps do not work, then more technical solutions may be necessary like disabling certain settings related to energy efficiency or adjusting graphics card settings.

Other Solutions

Disable Fast Boot Or Hybrid Sleep

Fast boot and hybrid sleep are both power-saving settings that help computers start up more quickly when they wake from sleep mode. While convenient and energy efficient, they often prevent monitors from regaining their signal upon waking.

To disable either of these options, one must go into the BIOS setup menu by pressing specific keys during startup depending on their computer’s brand name; commonly F2 or DEL will serve this purpose.

Once within the BIOS setup menu, look for fast boot or hybrid sleep and ensure that it is set to Disabled.

After making any changes to the BIOS settings, make sure you save them before exiting it.

Reset Cmos Battery

It’s typically shaped like a coin and has two metal prongs that connect into slots on the board.

For safety reasons, power down both the monitor itself, as well as unplugging the wall socket before removing the battery – this will prevent shocks or shorting out components due to static electricity build-up when handling hardware parts inside your machine.

Once done, remove the existing CMOS battery and replace it with a new one.

Carefully put everything back together then reconnect all plugs and cables – including turning your monitor back on again – before powering up your device once more. The entire procedure should only take around 5 minutes depending upon experience level; however, it could save you lots of time troubleshooting if no other solutions have been successful thus far.


Computer users need to take preventative measures against this type of problem before it occurs. Updating device drivers regularly and ensuring proper power settings are enabled on their machines can help reduce the likelihood of experiencing this issue in the future. Additionally, regular maintenance such as cleaning dust from fans and checking wiring connections will ensure optimal performance for PCs.

I am a computer engineer holding a bachelor's degree in Computer Science, complemented by a Master's in Business Administration from University of Strathclyde, Scotland. I currently work as a Senior IT Consultant in Melbourne, Australia. With over 15 years of...