IMPORTANT!
1. Please understand that the procedures pictured below should always be performed with safety in mind and that I am in no way responsible for any damage you do to the computer, the software or yourself.
2. This is not a tutorial and I am not an expert
3. I tried to follow as best I could the official service manual found on an unofficial site (ftp://ftp.hs-heilbronn.de/vdb/compaq/manuals/nc_nx_nw8000/)
If anyone is interested in getting more details about any of the procedures below, please tell me. Otherwise, this is just the little photo story of my journey. There is a problem I was hoping to fix by putting an insulated coin under the motherboard (see section 2 above), but that’s a different story that spans many many pages and terms like “product recall” and “planned obsolescence” come to mind. If you want more on that, go to hp service forums or google “hp nx8220 southbridge problem”. Anyway, the outcome was NOT what I expected, I didn’t fix the problem and I’ve added “no video” to the list 
I’ve also given up until I find someone who knows what they’re doing.
Updated on 23rd of October 2011: HP did some updating and shuffling of their forums. The old discussion can still be found here.
backside of hp nx8220 - remove battery and hard drive lid
remove hard drive
nx8220 hard drive
nx8220 bluetooth module
nx8220 bluetooth module
the wireless card below the touchpad, black and white wires are the atenna
the touchpad
removing the keyboard
the media panel (i think that's what it's called) underside
removing the media panel
removed the media panel, keyboard, touchpad
the faulty southbridge beneath the wireless card
the thermal plate
thermal plate removed
other side of thermal plate, fan
heatsink
removing the screen part 1
removing the screen part 2
the screen part and antenna
screen removed
naked (the top plastic part)
mainboard
audio board cobles
VGA connector (and pliars)
naked system board
bottom plastic plate
the mess
the culprit
the solution
the horror
Super-Duper internet site! I am loving it!! Will arrive back again once more – taking you feeds also, Thanks.
Ok, here is the problem that left you with no video and … no motherboard.
When you “build” again your tablet, on thermal plate the screw no 7 was too long and make a little pierce on the northbridge ( I’m not sure it is northbridge). So… it is possible that your solution with isolated coins was good.
Damn those long screws! Well, hope you had fun with it, Alex
So they planned for the damned chip to fail after two years, they programmed the battery to die after 500 charge cycles and they purposely put in two slightly different types of screws so that you would get confused and kill it if you ever tried to open it and put it back together again! Really no chance of survival for the old thing… Damn you HP, and damn you, screw no 7!
Anyway, I’ve moved on now. Time to hate Apple