Macbook Air 2017 Thunderbolt to HDMI no sign to exterior moniter. Monitor detected in shows however no signal-Detects solely once I get up from sleep


I have been utilizing a MacBook Air 2017 mannequin for the previous 4 years. I not too long ago purchased an exterior monitor and tried to attach it with a Thunderbolt to HDMI cable, however I do not see any sign on the monitor. If I put the system to sleep / shutdown / restart it with the cable linked, the show will get detected in System Preferences -> Shows. I can see the monitor’s identify and alter the decision choices, however there’s nonetheless no sign to the exterior monitor.

Troubleshooting strategies I’ve tried:

  1. Checking the cable with my buddy’s MacBook Air (identical mannequin): It really works completely.

  2. Detecting shows in System Preferences: Once I click on the “Detect Shows” button, the system display screen turns off for a couple of seconds, the Apple brand seems with a loading indicator, after which it returns to regular house display screen.

  3. I did Reset NVRAM and SMC. And I additionally erased the OS and put in a brand new one from restoration mode. These strategies didn’t work for my system.

  4. Unloading and loading the kext information for Thunderbolt: I attempted this, however I’m unable to unload the kext information and get the next error:

    (kernel) Cannot take away kext com.apple.driver.AppleThunderboltDPAdapterFamily; providers did not terminate – 0xdc008018.
    Didn’t unload com.apple.driver.AppleThunderboltDPAdapterFamily – (libkern/kext) kext is in use or retained (can not unload).

My system particulars

Macbook Air 2017
MacOS Catalina 10.15.7

Driver element

Thunderbolt Bus:

  1. Vendor Title: Apple Inc.
  2. Machine Title: MacBook Air
  3. UID: 0x000100181A924530
  4. Route String: 0
  5. Firmware Model: 27.2
  6. Area UUID: D5B181F9-9087-7C53-AC1C-E58307E86C56
  7. Port:
  8. Hyperlink Standing: 0x101
  9. Pace: As much as 20Gb/s x1
  10. Present Hyperlink Width: 0x1
  11. Receptacle: 1
  12. Hyperlink Controller Firmware Model: 0.15.0

Be at liberty to share options let me strive it. Thanks upfront 🙂

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