Approximately 1 year ago, we had a contest here on mobilehealthcomputing.com and we were giving away a Lenovo ThinkCentre M90z. In fact, the contest ran on a number of blogs.
Lenovo has issued a recall for certain ThinkCentre M90z & M70z All-In-One Desktops. Lenovo is voluntarily recalling 160,000 ThinkCentre M70z and ThinkCentre M90z all-in-one (AIO) desktop PCs worldwide sold between May 2010 and January 2012. Lenovo has determined that due to a failure of the power supply in the affected all-in-one PCs, the system can overheat posing a fire hazard. Lenovo has received two customer reports worldwide of fire that resulted in damage to the PC.
To see if your machine has been affected, visit this link and follow the instructions.