|Doubt I can help because I'm in the UK.|
However, for others this is a bit unusual (from a website):
This cord is not a "standard" power cord attachment that attaches to the back of the monitor.. It has an adapter and on the end of it is a small female attachment that plugs into the part of the VGA cord that you attach to your computer. The part that has the pins that slip into the computer. This part has a hole on the top (with a pin or post in it) that you plug the end of the adapter cord into. Most computer savvy people cannot believe this is where you connect it.
Always pop back and let us know the outcome - thanks