PS2 Keyboard - works on one PC, not on the other

martinlest said:

Both PCs run Win7 x64. On one, when I plug in a PS2 keyboard, it works immediately. On the other, it doesn't. I know the PS2 port is OK on that second PC, as a PS2 keyboard works fine in the BIOS (where, I think, PS2 is enabled automatically).
I have seen a suggestion that changing certain registry values should fix this.. but the values are identical in both PCs. There must be some setting that differs between the two PCs that means PS2 works differently in Windows.. anyone know what it might be?
(PS2 showed its worth the other day, when one PC got stuck waking from hibernation - the options, discard or re-use the hibernation data, needed a keyboard input to choose, but all USB had stopped working. Luckily, a spare PS2 keyboard, and of course the fact that my PC had a PS2 port, saved the day!).
Thanks.

Two things: One....NEVER, but NEVER plug in any PS2 device while the system is powered ON. Bad things can happen if you do. I know it's sometimes tempting, but just DON'T do it!

Two.... on some PC's the PS2 port is set back inside the PC's just a few thousandths of an inch making it hard to get the PS2 plug in far enough to make a good connection. In those cases, I've had to cut back on the rubber coating on the PS2 plug, like maybe 1/16th of an inch, so that it can be inserted deeper into the PC. That's always worked for me.

Good Luck, Mate!
TechnoMage

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I understand your concern but what I have is an additional USB option by use of both a 3 additional ports on a front media card input panel, I also have a secondary USB3 card at the rear of the case. When checking the system I disconnected the various options in turn and could always run a USB device via another port.
I also have Bluetooth available and several BT mice and keyboards as a secondary backup