I read from a gaming website today that Sony has issued a recall for PS2 models 8722346186-9000354127 stating that "The power output used in these model PS2's was higher than regulation, and could be hazardous". Sony also stated that the new batch of PS2's they shipped a few days ago are most likely faulty units.
You'd be well advised to check your PS2's model number (I know I will), as well as possibly avoid the new shipment of PS2's.

You'd be well advised to check your PS2's model number (I know I will), as well as possibly avoid the new shipment of PS2's.