This isn't a request for help, but more of a how I did it. It took me 2 hours to figure out and if I'd read about it first would have been that much easier. Basically it goes like this.
- remove the battery and both covers from the underside of the laptop
- remove all visible screws (lots of them)
- slide out the DVD drive, then remove the little screws revealed.
- remove HDD (pull tab to slide, then lift)
- remove wires from wireless card
- remove all screws from heatsink and fan mountings, unplug wires.
- Prise gently with fingers at heatsinks to release from paste, then bend fan up to remove heatsink and fan as one piece.
- remove the screw that was under the heatsink
- turn machine over
- release keyboard (little tabs along the top edge to release)
- release keyboard ribbon cable and remove keyboard
- remove all visible screws, release all cables and ribbons
- click up the edge of the front of the case and run your finger around inside to release
- voila! there's the BIOS battery. Replace it.
- reverse the sequence to put your machine back together.
- plug in the machine and turn on.
- keep tapping ctrl constantly on first boot to reset BIOS to original settings
Well, there it is. Definitely not designed for user service. I was blown away that I literally had to deconstruct the machine to a shell to get to the CMOS battery, but pleasantly surprised that it worked afterwards...
I hope this helps someone in the future.
Edited by TsVk!, 07 February 2014 - 11:22 PM.