Keyboard Not Responding PS/2

[Puzzled]

Most strange. Using Windows XP, I installed Vista in its own partition.
That went well, so now I have multi-boot. When I tried to use XP I found
the keyboard was not responding (PS/2), mouse was fine. I had THE EXACT
same problem when I had installed Ubuntu Linux, and it disappeared when I
uninstalled Ubuntu.

The keyboard works fine under Vista, so keyboard is OK. I can select an
item in multi-boot menu and CAPS and Num Lock appear to work as light goes
on. However, as soon as I get to the welcome screen I cannot enter my
password. Caps and Num keys do nothing.

I unplugged keyboard, booted and it recognized keyboard was not present.
Re-inserted keyboard, got to Welcome screen, in XP, and... nothing.

I've uninstalled driver, added device, it found the keyboard, re-installed
driver... rebooted, same problem

I'm using a usb keyboard now, but what's the problem? What's the
connection between Vista/Ubuntu and XP and the keyboard? How do I fix it?

Thanks for any help

 

[Guest]

You a pretty likely to be seeing a corrupt ps/2 keyboard driver corruption
issue. I would install the PS/2, and use Device Manager to do the rest.

Go to Start/Run, and type DEVMGMT.MSC , highlight the Keyboard device,
Action menu, "Uninstall", then restart Windows, to find the device drivers
again automatically.

 

[Puzzled]

=?Utf-8?B?TWFyayBMLiBGZXJndXNvbg==?=

You a pretty likely to be seeing a corrupt ps/2 keyboard driver
corruption issue. I would install the PS/2, and use Device Manager to
do the rest.

Go to Start/Run, and type DEVMGMT.MSC , highlight the Keyboard device,
Action menu, "Uninstall", then restart Windows, to find the device
drivers again automatically.

Actually, I had indicated I had already done that. Uninstalled, then
reinstalled and still had the same effect.

Thanks

 

[Puzzled]

Interesting, how is one suppose to type in the text if the problem is
that the keyboard's not working. In any event, since the mouse is
working I thought I'd go into device manager and do the same thing,
uninstall the driver. No keyboard is present!! Now what?

However if I unplug keyboard from PS/2 it won't boot as keyboard not
found error comes up during POST.

 

[Guest]

Hi Mark,

This is a similar problem with a PS/2 keyboard but not quite the same. I
haven't found any description anywhere online to help me.

I have an IBM ThinkCentre A51 minitower that I've been using for several
months at work. In the last month, if I have had the power strip turned off
overnight and then turn it on and do a cold boot the next day I get a "boot
sequence error" message but before I can read what it says, Windows loads to
the Welcome Screen. At this point my PS/2 keyboard not only is unresponsive
but all three LEDs are on solid.

If I do a warm reboot the same thing happens but if I power off completely
and power on again all is well--that is, unless I turn off the power strip
overnight, so I have been leaving it on for now.

I checked everything in the BIOS and loaded optimized settings, checked the
boot device sequence--all seems OK. It's just a mysterious occurrence
related to the overnight power to the motherboard and what it does the next
day.

As for the keyboard LEDs, when I watch the keyboard during the cold boot, at
the time that the keyboard lights would normally flash during the boot
process that's when they come on and stay on and won't respond to any
attempts to alter their state.

I was thinking that this might be a CMOS battery issue, but nothing else
seems adversely affected and the time and date are always current.

I haven't tried a USB keyboard swap yet, nor have I tried the device manager
uninstall/reinstall that you suggested in this thread, but I will.

Meanwhile, do you have any ideas about what is causing this?