Got an old Toshiba Satellite Pro 410 CDT. Used to work fine. Now
I've go problems with the keyboard. Some letters (i, k, VK_SPACE,
VK_RETURN, ...) do not work anymore. Not in Windows and not in DOS
mode. Really uncomfortable :-(

I thought it's the keyboard physically. So I bought 2 cheap ones
at EBay, inserted them - but got the same result. The keys mentioned
above still do not work. So it's not the keyboard nor the flat cable.

Next I thought to try it with an external keyboard. Working with an
external mouse is simple. I just plug it in at the PS2 socket, turn
power on and the the mouse works. However if I plug in the PS2
external keyboard, turn power on, then NOTHING happens. The internal
keyboard is still active, the external not.

What am I missing? Do I have to change some BIOS setting to use the
external keyboard? What else could I do to get back some normal
keyboard? Any ideas appreciated.

Uwe