My advice, If your talking about moving vids... I have moved several machines into my basement / down stairs. Overtime I found that the best method IMO is to remove as much weight as possible. It might be a little bit more time consuming this way, but trust me it's worth it. It's the same thing with moving a dresser with all your clothes inside.
- Remove the PCB
* Remove the Monitor
- Remove Control Panel
* Remove Back Door
- Remove Glass Bezel
- Remove Marquee
Sure the marquee, bezel, pcb, and control panel don't weigh much that's really more for protecting those pieces during moving. However removing the Monitor / Back Door significantly will reduce the weight of the cabinet. Making it alot easier for 2 people to carry without the need of a hand truck down the stairs with much more ease.
And If your nervous about removing certain wires, label everything so that way you can be sure your reconnecting everything properly.