Thunderbold Display does not recognize USB keyboard

[pitpalermo]

Hi everybody,

Ihave a Macbook Pro wich I use in combination with a Thunderbolt display. As well I have an Apple USB keyboard which is plugged in one of the USB ports of the Thunderbolt display.
The problem I have is, that the keyboard is not recognized oftentimes. Usually when I shut the laptop down and start it again. I usually managed to bring it to work when I unplug the keyboard several times and plug it in again OR I open the settings and wait for some time and do random things.
I don't have any problems when I just put the Mac to sleep. The keyboard will still work when I wake the Macbook up again.
The keyboard works perfectly well when I connect it with the Macbook directly - so it seems not to be an issue with the cable. Other USB devices work in the ports of the display - so this seems not to be the issue as well.
But of course I want it to work with the display so that I don't have to unplug too many things to take my laptop away ...
Thanks for ur help! john

 

[oldscribe]

Hi john,

If you have not done so i would first reset the NVRAM or PRAM. If you have never done this have a look here.
http://support.apple.com/kb/HT1379?viewlocale=en_US

 

[Kaveman]

I think the keyboards like to be plugged into their Macs

 

[pitpalermo]

okay, this is what worked for me: I stole my colleagues keyboard and plugged it in the thunderbolt display. It's the same apple usb keyboard.
It works. Never experienced problems again. Happy.

 

[oldscribe]

Hi,

Pleased to hear you have solved the problem.

I stole my colleagues keyboard and plugged it in the thunderbolt display. It's the same apple usb keyboard.
It works. Never experienced problems again. Happy.

So it was a keyboard or cable issue after all.

 

[pitpalermo]

Now it's getting interesting! Of course I had to return my colleagues keyboard when he returned from his hols.
So I took the old keyboard again until I finally get a new one.
And - surprise - I now works without any problems now. Didn't experience any issues since then!

Wonder how but actually I'm happy it works.

 

[Kaveman]

I'm guessing there is a very slight cable fault.

 

[oldscribe]

I'm guessing there is a very slight cable fault.

My thoughts to