Do you have Zebra desktop or small card printers that you bought between July 2010 through June 2012? If you do, the power bricks that came with your printer might have been recalled due to a fire safety hazard.
This applies to power supplies purchased with a new printer as well as aftermarket purchases.
About 160,000 of these Chinese manufactured power supplies were distributed, and while there have only been a small number of problems, check out the recall info on the Consumer Product Safety Commission site so you can see if yours is effected.
If your power supply is included in the recall Zebra will provide you with a free replacement.
You can contact Zebra at 800-658-3795 or by email at: PSUrecall@zebra.com