My computer won't sleep, the screen will go dark for a while but the fan still runs and keyboard lights stay on, then eventually it just dies

Mkay so pretty much like the title, when I try putting my computer to sleep the screen will turn off but the computer is still running. My computer is an HP pavilion dv6 that is just over 3 years old. It used to do this every once in awhile, but now it is every time I try putting it to sleep. I'll close the lid on it, but the fan still runs, the hp logo light on the lid stays on, and if I reopen the lid the power button light is still illuminated as well as the keyboard lights on the caps lock and wifi keys. The same actions occur when I try putting it to sleep manually (from the start menu). It is unresponsive to anything I do other than holding down the power key, but even when I do nothing, it will sit there like this for a while and then just turn itself completely off.

When it starts back up, it gives me the options to start in safe mode or start normally, and when I get logged in and it gives me the "windows has recovered from an unexpected shutdown," I see that there is a minidump file in windows that has something to do with it. I've tried searching the file and the problem together, and then each seperately, but nothing I've seen really describes my problem, so I figured I should just ask about my problem.

I've been reading about what other people have done, changing advanced power settings, changing the multimedia settings, etc., and have done these things but to no avail. It's not a huge deal, as I can just power down my computer whenever I'm done with it for now, but I don't know if this is a bad omen for the future of my poor computer. So if anyone could give me a hand in figuring this out, I would greatly appreciate it. Let me know if providing more details (OS, processor, my favorite color, social security number, etc.) would make this easier to resolve. Thanks

Also as an aside, if this is in the wrong forum topic area, please let me know.