Is this something to worry about? I have searched the forums archive, but can not find answer to this specific question. My Black Macbook is working properly. I have external (Dell) monitor and use bluetooth keyboard and mouse. When I close the Macbook to only use the external monitor, I activate it from sleep with keyboard or mouse = No problems. Using external monitor, macbook closed > there is a solid sleep indicator light. Everything appears to be working properly. Is there anything wrong? Potential problem? Thanks for comments.