Many users don’t stop at dual monitors and go further to triple-monitor setup. Either for entertainment or work efficiency, anyway, it’s just…awesome, and something that can “expand your horizon” and multiply your joy. But, wait…why is the third monitor not detected? This is so annoying! Don’t worry. In this post, we’ll show you how to fix it.

Try these fixes:

  1. Change your project mode
  2. Check Multiple Monitors settings
  3. Disable your graphics card
  4. Roll back your graphics driver
  5. Update your graphics driver

Fix 1: Change your project mode

Sometimes your third monitor not detected can be simply solved by changing project mode. You can run a quick troubleshooting by following the steps below:

  1. Press the Windows logo key + P at the same time.
  2. Select PC screen only.
  3. Disconnect all the external monitors. (Unplug the cables.)
  4. Power off your computer.
  5. Reconnect all the monitors.
  6. Power on your computer.
  7. Press the Windows logo key + P.
  8. Click Extend.
  9. See if your third monitor is working now. If not, move on to the next fix below.

Fix 2: Check Multiple Monitors settings

  1. Right click your desktop and select Display settings (Windows 10) or Screen resolution (Windows 7,8).
  2. Here you can confirm if all of your displays are detected. If not, click Detect.
  3. If yes, drag the three monitors to match your display configuration. (You can click Identify if you don’t know which screen is which.)
  4. Alternatively, you can right click your desktop and select NVIDIA Control Panel to double check your settings.
  5. Go to Display > Set up multiple displays, and make sure you’ve checked all the displays. You can also drag the icons here.

If your 3rd monitor remains not detected after basic troubleshootings, the culprit might be your graphics drivers. You can try the next fix below.

Fix 3: Disable your graphics card

  1. Open Device Manager.
    • For Windows 10: Right click Start and select Device Manager.
    • For Windows 10, 8, 7(all versions): Press the Windows logo key + R at the same time, then enter devmgmt.msc in the Run box and hit Enter.
  2. Expand Display adapters.
  3. Right click your graphics card driver and select Disable device.
  4. Wait for about 5 seconds for the device to be disabled.
  5. Right click the graphics driver again and select Enable device.
  6. Your third monitor should be detected right now.
Note: If you have two graphics card under Display adapters, you can disable NVIDIA or AMD card and enable it back.

If it doesn’t work for you this way, you can just disable your Intel card and let NVIDIA or AMD card driver do the job. Then reconnect your third monitor to check if it’s working now.

Fix 4: Roll back your graphics driver

If re-enabling your graphics driver failed to work, then the graphics driver may be at fault. You can roll back the graphics driver if you’ve made any changes recently. Sometimes the latest drivers don’t work properly. But if you didn’t perform any updates lately, you can skip to Fix 5 to update your graphics driver instead.

  1. Open Device Manager.
  2. Expand the Display adapters, right click your graphics driver, and select Properties.
  3. Go to the Driver tab and click Roll Back Driver, then follow the on-screen instructions to complete.
  4. Restart your computer for the changes to take effect.

Note: If the Roll Back Driver option is grayed out, it means there is no driver version that Windows can roll back to. This doesn’t mean it’s impossible to roll back the driver, just that you won’t be able to do it from the built-in option. You can download a previous graphics driver from the manufacturer’s website for your graphics card and install it manually, or try the following fix.

Fix 5: Update your graphics driver

Manufacturers such as NVIDIA and AMD keep releasing new drivers to fix known bugs and improve overall performance. Outdated graphics cards are known to have issues on three monitor setups, so make sure you have the latest graphics card driver installed.

To update your graphics driver, you can always have 2 options – Manually or Automatically.

Option 1 – Manually

To update your graphics driver manually, you need to visit the manufacturer’s official website to download the exact driver for your device and install it manually.

Method 1: Update your graphics driver via Device Manager
  1. Open Device Manager.
  2. Expand Display adapters and right click your graphics card.
  3. Select Update driver > Search automatically for updated driver software.
  4. Windows will find the latest driver and install it for you automatically.

However, Windows cannot always find the latest driver for you, so you can head to the manufacturer’s website to download the latest driver and manually install it or do it automatically in Option 2.

Method 2: Download the driver from the manufacturer’s website
  1. Head to the official website of the manufacturer and download the latest driver.
  2. Double click the downloaded driver file and follow the on-screen instructions to finish the install.
  3. Restart your computer for the changes to take effect.

Option 2 – Automatically

If you don’t have the time, patience or computer skills to update the graphics driver manually, you can do it automatically with Driver Easy.

Driver Easy will automatically recognize your system and find the correct drivers for it. You don’t need to know exactly what system your computer is running, you don’t need to risk downloading and installing the wrong driver, and you don’t need to worry about making a mistake when installing.

All the drivers in Driver Easy come straight from the manufacturer.

You can update your drivers automatically with either the FREE or the Pro version of Driver Easy. But with the Pro version it takes just 2 clicks:

  1. Download and install Driver Easy.
  2. Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.
  3. Click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system (this requires the Pro version – you’ll be prompted to upgrade when you click Update All. You get full support and a 30-day money back guarantee.)

    Note: You can do it for free if you like, but it’s partly manual.
  4. Restart your computer for the changes take effect.
  5. Check if your third monitor can be detected now.
If you need assistance, please contact Driver Easy’s support team at support@drivereasy.com.

Good to go?

If the fixes above doesn’t work for you, contact your computer or motherboard manufacturer or google your graphics model + 3 monitors. Determine if your model supports three displays and what configurations are required.

Also, check the ports on your laptop, for the monitors should have the corresponding ports as well. Otherwise you will need to buy an extra adapter, such as DVI to HDMI adapter or HDMI to DVI to have them match.

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