Windows 10: Surface Pro 7 Type cover not present in device manager

Typecover used to be there in device manager hidden items but it is not there now.It doesn't work and I've tried a whole list of fixes to no avail.Lastly I tried a clean image of Windows 11 and all the updates. And the Surface Update.I wonder if the magnetic port is turned off.What is the device id of the magnetic port into which the type over fits?Can I view its on/off status somewhere?As Typecover is, according to the Surface DIagnostic Toolkit, a "Third Party device that is not supported", just WHO is the Third Party and do they supply drivers for it on their website?I think Microsoft hav

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MS Surface Keyboard Cover not recognized by MS Surface Pro 3

My Surface Pro 3 cover mysteriously stopped working (other USB keyboards work).

I’ve exhausted all of the steps from the Internet and am hoping for some advice here on what to try next.

• Clean the metal pins on both the keyboard and the Surface Pro 3 with alcohol swap and q-tip.
  
• Performed the standard two button shutdown procedure - Force a shutdown and restart your Surface - Microsoft Support
  
• Update "HID keyboard" device in Device Manager.
  
• Uninstall and reinstall "HID keyboard device" in Device Manager.
  
• Removed HID keyboard device in Device Driver and manually installed Surface Type Cover device (which later automatically turns to "HID keyboard device" when you hit "update drivers")
  
• Updated all Windows 10 patches to date.
  
• Tried a brand new keyboard (Microsoft FMM-00001 Type Cover for Surface Pro https://www.amazon.com/gp/product/B073W4MPJF/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 )
  
• Updated firmware for Surface Pro 3 (typed in “winver”, took that Windows version, then downloaded the specific patch required here - Download Surface Pro 3 from Official Microsoft Download Center)
  
• Reset Surface Pro 3 while keeping personal files
  
• Reset Surface Pro 3 and deleted all personal files
  
• Performed hardware tests on aka.ms/surfacerepair (nothing bad found; all looks ok)
  
• Drained the battery most of the way before connecting again - the two times it worked momentarily these last few days was when I connected my new type cover keyboard to the Surface Pro 3 after the battery had died down to below 50%; a simple reboot later, everything stopped working. This user seems to have the same problem with it working briefly when there is low battery - https://answers.microsoft.com/en-us...pe-cover/52f983c6-2e53-49fa-aac6-7c4cc5d25d9f )
  

A breakdown of the steps I've done to sometimes get it working

• Leave Surface Pro 3 on about 2 hours on battery only.
  
• Power on Surface Pro 3.
  
• Working Keyboard.
  
• Turn off Surface Pro 3 (or reboot)
  
• Keyboard not working anymore
  
• Another similar user here - https://answers.microsoft.com/en-us...er-issue/2d6ed60a-c892-4ed9-907f-846fd9496f5a
  

Can anyone recommend any other troubleshooting steps? One of these steps seemed to work ok for others having this same problem.

 

New Surface Pro 4 Firmware Updates - Sept. 14th 2017

Source: Surface Pro 4 update history - Microsoft Support

 

New Surface Pro 4 Firmware Updates - Sept. 14th 2017

Source: Surface Pro 4 update history - Microsoft Support