The monitor is an important peripheral. There’s nothing more frustrating than Thunderbolt display not working. Luckily, in this post on MiniTool Website, you can fix this issue easily with the instructions below. Sincerely hope that they can help you out.

Thunderbolt Display Not Working  

Thunderbolt is a way of connecting a display to a computer that was released by Apple several years ago. It is known for supporting high-resolution displays and high-performance data devices with a single port. This single port can take up to 6 devices.

At the same time, this input & output technology also has some evident advantages – speed, simplicity, and flexibility. It is much faster than FireWire, USB 2 and USB 3 because it can handle 2 streams of 10 gigabytes per second each.

However, some of you may experience Thunderbolt display not working. It is so annoying that you might see nothing on the screen when that occurs. Take it easy! In this guide, we have collected some efficient solutions for you and each of them deserves a try. Without wasting any time, let’s dive into it now.

How to Fix Thunderbolt Display Not Working?  

Fix 1: Update Mac & Thunderbolt Firmware

If you just encounter Thunderbolt display camera not working, you can consider updating your Mac and Thunderbolt display firmware. Follow the instructions below:

Step 1. Go to App Store and click on the profile icon.

Step 2. If you see there are updates available, choose to update both Thunderbolt and Mac software. If there isn’t enough space for the update, it is time to uninstall some useless or unwanted apps to spare more space for the new update.

Step 3. The last step is to check for your updates. Click the Apple icon and select About This Mac from the drop-down menu. In System Reports, you can check if your Mac and Thunderbolt are updated successfully.

Fix 2: Reset VRAM

NVRAM refers to non-volatile information and it stores information including your screen resolution. If you are getting the wrong screen resolution, you can try resetting NVRAM to fix Mac Thunderbolt display not working.

Step 1. Click on the Apple icon and choose Shut Down from the context menu.

Step 2. Press the power icon to turn on your computer again. As soon as you hear the start-up chime, press and hold the Command, Option, P, and R keys on the keyboard.

Step 3. When you hear the second computer chime, release the keys.

Fix 3: Reset System Management Controller

System Management Controller manages system performance, fans, lights and power on your Mac. When Thunderbolt display not working appears, you can reset it to see if it helps you out.

Step 1. Turn off your Mac. Press and hold the Shift, Control, Option and Power keys for 10 seconds.

Step 2. Release the keys and turn on your computer by pressing the Power button. Unplug the power cable and re-plug it after 15 seconds. 

Fix 4: Check Display Resolution

Another way to fix Thunderbolt display not working is to set the resolution to default. Here’s how to do it:

Step 1. Go to Dock > Finder > put your cursor to the top menu > hit Go.

Step 2. Click on Application to open the Application folder. Search and click on System Preferences.

Step 3. Find the Display icon and hit it. Then, set Resolution to Default for display.

Fix 5: Isolate the Thunderbolt Monitor

The last resort is to isolate Thunderbolt from the other peripherals. To do so:

Step 1. Shut down your computer.

Step 2. Unplug the Thunderbolt monitor from your Mac. Plug it again after a while. If Thunderbolt display not working is still there, plug the Thunderbolt monitor into a stand-alone socket to isolate it from other peripherals.

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