About 50,500 Lenovo ThinkCentre M70z and M90z desktop computers have been recalled. A defect in an internal component in the power supply can overheat and pose a fire hazard. The computers were manufacturered and imported by Lenovo, of Morrisville, N.C. The firm received reports of one fire incident and one smoke incident in the U.S. No injuries have been reported. The recalled all-in-one desktop computers, or PCs, are flat-panel monitors with the PC integrated into the monitor housing itself. The power supplies are also inside the monitor or PC housing. The computer chassis has a matte black finish with the brand name “ThinkCentre” in the lower left hand corner of the monitor front.

The recalled desktop model numbers are M90z and M70z. The serial number and manufacturing date code can be found on a label on the underside of the unit. The computers were sold online at Lenovo’s websites, by telephone and direct sales through Lenovo authorized distributors nationwide from May 2010 through January 2012 for about $500 for the M70z model and $800 for the M90z model. Consumers should immediately stop using the computers, unplug the power supply and contact the firm to determine if your computer is included in the recall and to schedule an appointment for a free replacement of the power supply. For additional information, contact Lenovo toll-free at (855)248-2194 anytime, or visit their website at www.lenovo.com/aiopsurecall.