I figured out how to remove the keyboard, and thought I'd share the solution with the forum members.
The (Norwegian) keyboard on the D8830 which I've recently serviced, is held in place by 3 spring loaded metal tabs (see red arrow in attached image) located above the F1, F8 and Num lock keys. 4 more tabs below the Fn, Space, "right-click menu" and right arrow keys are inserted from the keyboard backplate into slots in the laptop chassis.
To remove the keyboard you need two small slotted (flat) screwdrivers (or similar equipment). Always remember to disconnect the AC-adapter from the laptop and remove any electrostatic charge from your body before handling computer parts.
1) Carefully insert one screwdriver between F1 and the leftmost metal tab (red arrow).
2) Gently push the tab away from the keyboard by tilting the screwdriver towards the keyboard.
3) Insert the second screwdriver between the keyboard backplate and the chassis (yellow arrow).
PS! Make sure the screwdriver gets hold of the backplate, and NOT the ESC key.
4) The tricky part is using the second screwdriver to tilt the upper rightmost part of the backplate above the first tab so that you can use the first screwdriver on the next spring loaded tab. With some patience and a few (or many) attempts you'll succeed.
5) Continue with the remaining uppermost tabs by repeating the procedure in steps 1-2 and use the second screwdriver (or your fingers) to tilt the backplate further away.
PS! The backplate should only be tilted above the tabs until it is released from the third tab (above the Num lock key).
6) Tilt the keyboard approx 30 degrees and slide it towards the screen to release the lowermost tabs from the slots in the chassis. If the keyboard is stuck, try gently rocking it from side to side.
7) Tilt the keyboard 90 degrees and disconnect the flat cable which runs from the keyboard into the chassis.
Hope this helps others. As with most computer parts, brute force is seldom a good solution.
Regards, Palsam