I have a late 2010 Macbook Pro and I recently noticed a strange issue that occurs when I put the notebook into sleep mode, either via closing the lid or manually in the Apple menu. When I sleep the machine, the white LED (sleep indicator light) on the front of the notebook stays on and is solid, rather than pulsing as per usual. I have tried a few things to solve the problem such as resetting the SMC and making sure all processes were terminated before sleeping the notebook, but have been unable to solve the problem. I have noticed no other problems that could be related to this one, but I am worried that my computer isn't sleeping properly (HDD is still active perhaps?) If anyone has a solution, I'm open to suggestions.