I just bought a refurbished monitor from newegg.com and was wondering if LG offers a standard 3 year warranty on it. I tried searching their website but it doesn't say anything about refurbished items.
You can click the box to buy a 1 year warranty from Newegg for $17.
Refurbished electronics does not generally carry a full warranty like a new product unless perhaps you buy directly from the manufacturer. For example, I believe all Dell refurbished laptops and desktops carries a full warranty when purchased directly from Dell.