Keyboard no longer working.

I have a windows 2003 server that is having an issue with a non responsive keyboard.
The keyboard stopped working after Microsoft connected remotely to troubleshoot an issue.
The device shows up in device manager with no marks (x or !)
When disconnected from USB, it does remove itself from device manager.
I have tried several things in searching for a solution.
The keyboard has been replaced multiple times with both used and new keyboards.
The issue persists even with a ps2 keyboard.
I have removed the item from device manager and had it check for and reinstall the device.
I have deleted the device in device manager and restarted the server allowing it to find the device (which it does).
The device works prior to the windows environment starting.
Multiple usb ports have been tried. (both built onto the mainboard and on a card)
I have replaced Usbehci.sys, Usbhub.sys, Usbport.sys and Hccoin.dll with known working copies.
Currently I am only able to remote into this machine.
This is our main server so restarts are to be avoided unless absolutely unavoidable, and then only after hours.
Thanks in advance for any help on this issue.
zemarcAsked:
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Tony GiangrecoCommented:
You didn't mention what brand server it is, but mentioning it has PS/2 ports means it's much older that most servers we use today.

Initially, since it has a PS/2 keyboard port, if you had a PS/2 keyboard plugged into it when Microsoft connected to it, then i'd examine the pins on that keyboard's plug and verify they are not bent.

If they are straight, plug it back in and restart when you can. There is a possibility the app they used to comment with cause the keyboard driver to be disabled for some reason. It might sound crazy, but crazier things have happened on Windows servers.

Hope this helps.
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zemarcAuthor Commented:
@TG-TIS

It is an HP machine. The PS/2 keyboard has also been replaced three times, both with a used keyboard and two new ones. It has also been checked (all pins are accounted for and in good shape) and reseated multiple times. I am not discounting anything at this point. Thank you and please keep the suggestions coming.
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Tony GiangrecoCommented:
When you can, the restart may be needed. There could be some conflict with the active-x app they normally use for the remote connection and your keyboard.

No way to rule that out without a restart to clear all running apps.
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zemarcAuthor Commented:
@TG-TIS

This has been going on for a while now. As recently as last week, updates were applied and the server restarted. It has also been restarted a couple of times prior to that during troubleshooting. There has been no change.
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Tony GiangrecoCommented:
I'd get a bootable Cd that has the HP Diagnotics on it and run a full system test. The HP diad routine will have it's own drivers and would be the best test to see if the keyboard port went bad or if the windows driver looks to be a problem,

You might have to burn one with a special command that autoloads the motherboard test since the keyboard may not work if the port is bad. Although you could also try a USB keyboard for the diagnostics test.
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zemarcAuthor Commented:
@TG-TIS

USB keyboards also do not work. The ports work fine as they can see external drives, a mouse, and the like.

I have a nagging feeling it is an issue within the registry.
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Tony GiangrecoCommented:
I definitely recommend running the HP system diagnostics program.  You may have damaged ports.
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zemarcAuthor Commented:
this is still an issue.  we will reinstall windows.
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zemarcAuthor Commented:
changed the main board to see if that would work....nada.  Eventually reinstalled Windows. (ughh).
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Windows Server 2003

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