Lenovo is recalling some 50,000 all-in-one desktop PCs due to a fire hazard.

The U.S. Consumer Product Safety Commission and Lenovo announced the voluntary recall on Thursday.

Some 50,500 machines called ThinkCentres are involved.

Lenovo, the world’s No. 2 PC manufacturer which operates its executive headquarters in Morrisville, cited one “fire incident” and one “smoke incident” involving the ThinkCentres, which are machines that pack the processor, power supply and infrastructure of the PC inside the monitor housing.

“Hazard: A defect in an internal component in the power supply can overheat and pose a fire hazard,” the recall announcement says.

Owners are encouraged to stop using the machines and call Lenovo.

“Remedy: 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,” the recall notice reads.

Models affected are M70z and M90z.

“Only certain of the M70z and M90z computers built in this time frame are affected,” the CPSC said. “Consumers will need to check the serial number on their computer with Lenovo to determine if it is subject to this recall.”

The machines were manufactured in Mexico and were sold between May 2011 and January 2012. 

In the fourth quarter of 2011, Lenovo sold nearly 12 million computers of all brands.

The full recall notice follows:

Lenovo Recalls ThinkCentre Desktop Computers Due to Fire Hazard

WASHINGTON, March 8, 2012 /PRNewswire via COMTEX/ — The U.S. Consumer Product Safety Commission, in cooperation with the firm named below, today announced a voluntary recall of the following consumer product. Consumers should stop using recalled products immediately unless otherwise instructed. It is illegal to resell or attempt to resell a recalled consumer product.

Name of Product: Lenovo ThinkCentre M70z and M90z computers

Units: About 50,500

Hazard: A defect in an internal component in the power supply can overheat and pose a fire hazard.

Manufacturer/Importer: Lenovo, of Morrisville, N.C.

Incidents/Injuries: The firm received reports of one fire incident and one smoke incident in the U.S. No injuries have been reported. Description: 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 along with the serial number and manufacturing date code can be found on a label on the underside of the unit.

 

Models Date Codes

M70z 1001 to 1012
and
M90z
1101 to 1112
001 to 012
101 to 112

Only certain of the M70z and M90z computers built in this time frame are affected. Consumers will need to check the serial number on their computer with Lenovo to determine if it is subject to this recall.

Sold at: Online at Lenovo’s websites, by telephone and direct sales through Lenovo authorized distributors nationwide from May 2011 through January 2012 for about $500 for the M70z model and $800 for the M90z model.

Manufactured in: Mexico

Remedy: 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.

Consumer Contact: For additional information, contact Lenovo toll-free at (855)248-2194 anytime, or visit the firm’s website at www.lenovo.com/aiopsurecall .

Get the latest news alerts: Follow WRAL Tech Wire at Twitter.