keyboard failure after RAM upgrade

  PhiltheFragger 14:35 15 Apr 10

This is a good one.
6 year old Packard bell PC running XP home sp3 it only has 256 MB RAM and needs a RAM injection.
Did a crucial scan which was Ok and said that the max RAm was 2GB @ 1Gb per channel, so I ordered a 1Gb stick. when it arrived I installed it. Machine was fine, much faster, except the keyboard doesnt work.

When you press a key it beeps, put in a usb keyboard, same problem.
Keyboard shows in device manager no problems.
On startup you can use the keyboard to enter BIOS but when windows starts, no play.

I then moved the 2 ram chips around, no change
I then restarted it with the original RAM chip, keyboard works.

Sent the chip back to crucial and ordered another one, this time I used the manual crucial selector rather than the scanner and selected using the motherboard, so got a slightly different chip.

Same problem.

I reckon it is a motherboard issue, but im confused as the problem only occurs after windows kicks in, so is it a driver issue?

any ideas please

  Fruit Bat /\0/\ 15:30 15 Apr 10

Is it the same in safe mode?

  PhiltheFragger 15:32 15 Apr 10

yes it is, which makes me think even more that it is the Mobo

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