A1200 keyboard problem

[btrpathead]

Hi.  At a car boot sale today I picked up a A1200 (my first Amiga ever!).  It does seem to have a problem with the keyboard.  Whenever I press "L" I get "L`", when I press "9" I get "9-" and pressing "4" on the keypad presses 4 and return!  The only way I was able to test this was with the shell program i the workbench 3.0 disk I got with it.

I also get Exile with it and that seems to play fine.

[btrpathead]

No.  I only geo 3 disks with it, Workbench 3.0 and Exile disk 1 and 2.  At one point when I had it open pressing space would give ". " and pressing 9 would give "9-=".  I also forgot to mention that the reverse is also true, pressing - would give 9- and pressing [ would give o[ etc...

Anyway as I had it open I accidentally gave it quite a sharp knock and the keyboard went back to the previous state.

EDIT:

I have opened up the keyboard and it seems fine and the connecting ribbon also.  Back to the original problem, I forgot to mention that if for example I press and hold 9, I would get "9---------" and I get exactly the same if I press -.  The same is tru for the other keys I mentioned earlier.