Dealing with an Asus laptop that cannot detect an external monitor can be quite frustrating. If you’ve found yourself in this situation, don’t worry. In this post, I’ll walk you through the step-by-step guide to troubleshoot and resolve this common issue. Just read on to follow the steps.
To resolve the Asus laptop not detecting external monitor, you can try the methods below. Try them one by one then you may find the one that helps
Method 1: Check a Hardware Troubleshooting
Method 2: Change the Projection Settings
Method 3: Disable and Enable Graphics Card Drivers
Method 4: Uninstall and Install Graphics Card Drivers
Method 5: Roll Back Graphics Card Drivers
Method 6: Check for Windows Updates
Method 7: Reset BIOS
Method 1: Perform a Hardware Troubleshooting
The problem can be caused by a faulty cable, a malfunctioning port, or a bad monitor. So first, perform a basic hardware troubleshooting and ensure the hardware is working fine:
- Connect the monitor to your Asus laptop through another port. If it works, the port is the problem.
- Test with another cable (the cable you know it’s good) to connect the monitor to your laptop. If it works, your cable is the problem.
- Test with another good monitor on your laptop. If it works, your monitor is the problem.
- If possible, connect the monitor to another device. If it works, your laptop is the problem.
After you performing a basic hardware troubleshooting, if you found the problem caused by the laptop, read on to try other methods.
Method 2: Change the Projection Settings
Sometimes, the problem can occur just because you have the wrong display mode selected. In this case, you need to manually set correct display mode.
On your keyboard, press Windows key + P, then you’ll see the available display modes for you to choose. Usually, there are four display modes: PC screen only, Duplicate, Extend, or Second Screen only. To add an external monitor to your Asus laptop, select the Second screen only option.
Check to see if ‘Second screen only’ selected, if not, select it. Then your laptop should be able to detect the external monitor.
Method 3: Disable and Enable Graphics Card Drivers
To fix your Asus laptop not detecting external monitor issues, you can try disabling and enabling graphics card drivers. To do so:
1) Open Device Manager.
2) Expand the category ‘Display Adapters‘, right click on the graphics card device and choose Disable device.
3) Once it’s disabled, right click on the graphics card device again and choose Enable device.
Tip: If you have two graphic devices listed under the category ‘Display Adapters’, do it on both.
If this method doesn’t work, you can try reinstalling the graphics card drivers. Continue to try the next method.
Method 4: Uninstall and Install Graphics Card Drivers
Malfunctioning graphics card drivers can be a culprit. You can try reinstalling graphics card drivers and see if it helps. If not, try updating the graphics card drivers. Follow these steps:
1) In Device Manager, right-click on your graphics card device and select Uninstall device.
2) In the pop-up window, select the checkbox next to Delete the driver software for this device and click Uninstall.
Tip: If you have two graphics cards, do it on both.
3) Once the uninstallation is complete, reboot your laptop and check to see if the problem persists.
If the problem still persists, try updating the graphics card drivers. You can go to the manufacturer’s website to download the latest version of the graphics card driver, then install it on your computer.
Alternatively, you can use Driver Easy to help update drivers easily. The free version of Driver Easy allows you to update a driver with just a few clicks.
Method 5: Roll Back Graphics Card Drivers
If the problem occurs after you update graphics card drivers, rolling back the drivers can help fix the problem. You can follow these steps to roll back graphics card drivers:
1) In Device Manager, right-click on the graphics card device and select Properties.
2) In the Properties window, select the Driver tab and click on Roll Back Driver.
3) Follow the steps to complete the process.
Method 6: Check for Windows Updates
Updating Windows might help fix the Asus laptop not detecting external monitor issue. Follow these steps to check for Windows Updates and install any available updates:
1) Press Windows key + X to open the Quick Link menu.
2) Select Settings.
3) In the Settings window, select Update & Security.
4) Click Check for updates.
5) Install any available updates.
Method 7: Reset BIOS
If none of the above methods works, the last resort you can try to do is resetting BIOS on your Asus laptop.
Firstly, follow these steps to enter BIOS:
1) Press Windows + S keys to open the search box.
2) Type ‘Change advanced startup options’ in the search box and click on the result from the result list.
3) In the Advanced startup section, click Restart now.
4) Continue to click Restart now.
5) After your laptop restarts, select Troubleshoot.
6) Select Advanced options.
7) Select UEFI Firmware Settings.
8) Click Restart. After the restart, your computer will enter BIOS.
In BIOS, follow these steps to restore BIOS settings:
1) Press the hotkey F9 on your keyboard.
2) Click Ok to confirm to load the BIOS optimized defaults.
3) Press the hotkey F10.
4) Click Ok to save and exit BIOS. Then Windows will restart automatically.
5) After entering Windows, check to see if your laptop can detect the external monitor.
Important: the BIOS is a critical component of your computer, and resetting it should only be done when necessary. If you’re not comfortable performing these steps or if you’re unsure, it’s advisable to seek assistance from Asus Support or a qualified technician.
Finally, hope you find this post helpful on resolving the issue of “Asus laptop not detecting external monitor”. If you encounter any questions while troubleshooting with the above steps, feel free to leave a comment below.