Lenovo is recalling more than 500,000 computer AC power cords in the U.S. after receiving reports of the cord overheating, sparking, melting, and burning. Laptop computers with the AC power cords were sold at computer and electronics stores, authorized dealers and online at www.lenovo.com from February 2011 through June 2012 for between $350 and $1,500.

This recall involves Lenovo's LS-15 AC power cord manufactured from February 2011 to December 2011. The power cords were distributed with IdeaPad brand B-, G-, S-, U-, V- and Z-series laptop computers and Lenovo brand B-, G- and V-series laptop computers. The recalled power cords are black in color and have the "LS-15" molded mark on the AC adapter end. The manufacture date code in the format REV: 00 YYMM is on a label attached to the cord.

All problematic cords were reported by users outside the U.S. The current recall also affects 44,000 devices sold in Canada, according to the U.S. Consumer Product Safety Commission.

Lenovo says it has received reports from outside the U.S. of 15 incidents involving overheating, sparking, melting and burning. No injuries were reported.

If you are owning a problematic power cords you should immediately unplug and stop using it and contact Lenovo for a free replacement.