With all the issues around the world with messed up Keyboards on the dv8000t I think a few brief notes on how to check your keyboard connections can come in handy.
Recently I disassembled my entire dv8000t to see if a CPU upgrade is possible, find the info here
While taking apart the Laptop I found how easy it is to get to the keyboard and check the connections to make sure they are 100%.
Steps On how to remove the dv8000t Keyboard
Proceed at your own risk, If you don't know anything about laptops do not proceed.
Remove the following from the Laptop: Hard Drives, Ram, & Battery.
Flip the Laptop over and remove the screws from the corners and insides of the ram, Battery bays. The Big red circles should have a Keyboard icon next to the screw that you will need to remove. 1 is tucked up against the Wireless PCI card, and the other is at the bottom side of the Battery bay.
Once all the screws are removed flip the laptop back over and open the screen lid as far back as it will go.
Carefully use a tool "small flat head screw driver" and pry the plastic cover that buts against the screen. This will be snapped in place right where the hinges are on both sides. Don’t pull to hard but try to carefully pry both sides where the hinge is... it should come up easily.
Now you can slide the keyboard up about 1/8 to 1/4 of and inch up and than lift revealing the 2 cables that connect the keyboard to the Motherboard.
The slots that hold the cables do not pull up use a small flat head screw driver and push the 2 brown/black brackets on each side forward. This will release the cables and allow you to remove the Keyboard from the laptop.
Check the cables for any damages and if all looks good re insert the cables into the brackets and push the brackets back in place insuring a secure connection.
Slide the Keyboard back in place in re-insert the upper Hinge cover and replace all the screws. If you want replace all the items before screwing everything back in for a test to make sure everything is properly connected.
Replace all the screws and hopefully your keyboard issue is fixed.
Hope this helps
If you have any questions feel free to ask.