I have a problem with my Macbook (early 2008). It suddenly stopped recognizing some USB devices. Here is the list of devices I tried to connect to the Macbook. YES/NO at the device name means whether it works or not: - my iPhone 3G - NO - my girlfriend's iPod Nano - NO - my external hard drive (WD My Book Essential 2.0) - YES - friend's external hard drive (WD My Passport Essential) - NO - friend's Nokia 5310 - NO - both my USB Flash Drives - YES - my Microsoft Habu Mouse - YES - my Olympus digital camera - YES I looked in System Profiler if the non-working devices are shown there but they are not. Any suggestions what might be the problem ? Note: MacBook is fully charged and I've tried both my USB ports.