Lenovo has issued a worldwide recall of its ThinkCentre all-in-one PCs as the Chinese PC maker warns users to unplug their computers because of a potential fire risk. The fire hazard is due to a faulty power supply.

Lenovo, the world's third largest PC vendor, is voluntarily recalling 160,000 M70z and M90z ThinkCentres sold worldwide between May 2010 and January 2012. Due to a failure in the power supply in the all-in-one PCs the units could overheat and poses a potential fire hazard. Lenovo has received two customer reports worldwide of fire that resulted in damage to the PC. Good Gear Guide reports that one PC caught fire and the other PC emitted smoke.

The Australian Competition and Consumer Commission has released a product safety notice for Australian consumers about possible overheating and smoke in Lenovo's M90z PCs due to defective metalized capacitors inside the power supplies. The Lenovo Think Centre M70z isn't available locally. The ThinkCentre M90z is still on sale in Lenovo Australia's online store. The ThinkCentre sells for $999 for the Intel Core i3 processor with non-multitouch while the $1399 version has an Intel Core i5 processor with multi-touch functionality.

Australian consumers who bought Lenovo ThinkCentre between May 1, 2010 and January 30, 2012 should immediately stop using the affected machines and unplug it from the power outlet. Consumers should call the Lenovo Support Centre on 131 426 and check if the machines are affected. Affected users can then avail of a free replacement power supply.

"Lenovo greatly appreciates your business and apologises for the inconvenience caused by these issues," the PC maker said in a statement.