On Mon, Mar 18, 2013 at 1:36 PM, Richard <legalize at xmission.com> wrote:
  OK, I've got an HP X-Y display with the older
power cord connector,
 where the three pins are round instead of two being blades and the
 only the ground pin being round.  The entire plug socket is also
 rounded instead of angled.
 I've tried to find a relevant picture on the interwebs, but you try
 googling "power coord connector" sometime and see if you can find the
 older oddball you're looking for...
 Hopefully my description alone is enough to aid someone in identifying
 the exact standard/specification for this kind of connector.
 I'm looking for cords that fit the connector.  I will try to remember
 to take a picture with my phone on Wednesday when I am down at the
 museum, if we can't figure it out by then. 
Maybe one of these as shown on Brent's page here:
http://www.cs.ubc.ca/~hilpert/e/powerConn/index.html#163
Belden 17952 or 17280, depending on polarization.