Until a few weeks ago, closing the lid on my SL510 made it go to sleep automatically within a few seconds.
I haven't changed any settings but I noticed it started to "wake up" again even when the lid remained down.
Now it won't go to sleep at all unless I do it manually with the power button.
Any ideas please?
Welcome to Lenovo Community
To resolve this issue please try following options
Power Manager http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS014924
Power Manager Patch modulehttp://support.lenovo.com/en_US/downloads/detail.page?DocID=DS018811
Hope This HelpsCheers!!!
Just a quick check. Did you try out RMattoo Suggestion in updating the powermanagement. Do let us know of the results.