I looked at one of the manuals for your monitor, and it appears to be a common standard cord used by most monitors that do their own internal power conversion, looking like this: [IMAGE] As they are standard, you may buy any brand and in various lengths, such as from this Amazon listing. Be sure to buy a cord that has approval from a safety authority, such as Underwriters' Laboratories (UL) or Underwriters' Laboratories of Canada (ULC). A very cheap cord may lack such a designation and may not be safe.
I am looking for a longer power cable for my Gaming Monitor (have to move monitor several feet and can not move power board) can anyone point me in the right direction  to buy one? Thanks In advance  John  
Dell Gaming S2721HGF