IBM Recalls 553,000 Laptop Power Units. this is a public service announcement on behalf of, well your laptop if you have one of these systems: IBM ThinkPad i Series, ThinkPad 390 and 240 Series and a limited number of ThinkPad s Series laptop computers. its a power supply problem. if it has part number 02K6549, read the article. half a million laptops! thats a lot of problems. wonder how much that recall would cost?