I bought a MBA 13" a month ago. After a week or so my screen just shut down completely, and the logic had to be changed. Since then, I've had problem with slow startup times (maybe twice as long as before) and, even more disturbing, when i shut the lid to make the computer go to sleep, it does so only for a couple of minutes. If I leave it for lets say 30 mins, it has shut down itself. This is my first mac, so I have litte experience when it comes to trouble shooting, but after some detective work i found some kind of log. This is what it says: 2011-02-24 11.04.28 configd Sleep: Platform Failure - BATT 73 com.apple.message.domain: com.apple.powermanagement.sleep com.apple.message.signature: Platform Failure com.apple.message.result: Failure com.apple.message.uuid: 8CCE7FC0-7A7F-45C6-B996-D95AA9053368 Anyone?