>Pure conjecture on my part - but it may very well be a wattage >issue. My current power supply (used for my 15" 550) is rated for 45 >watts. What is your new supply rated at? > The older supplies were 45 W and the newer supplies are 65 W. Having invested in a couple of extra 45W power supplies for my old TiBook I was curious as to whether they would work with my new 17 incher and they seem to be fine. They get a little warm, but so far I haven't had any major fires. Disclaimer: if you burn your house down don't sue me - I didn't tell you it was OK to do it. Make sure you insurance is paid up. Void where prohibited. Paul --