For the past few weeks my laptop won't go into sleep mode. I like to put podcasts on as I fall asleep and usually my laptop will go to sleep after 20 minutes of inactivity, and I pick up the podcast where it left off the next night. Now it just runs all night or, if I unplug it, it runs until the battery drains, whether the podcast is still playing or not. The power settings have been checked and adjusted. I've run a command prompt to make sure nothing is keeping my laptop turned on. I've troubleshooted Power and System Maintenance and fixed any issues. Nothing works. Any suggestions?