That does basically the same thing as what you did with the button.
I doubt it will help, but yes you can easily take the battery out with something like a screw driver by pressing the metal plate toward the wall of the enclosure.
Wait for 30 min and put it back in.
I don't have much hope of it doing anything, but it wouldn't hurt either.
All that does is make the computer rebuild its hardware configuration file that tells the computer which devices are connected to the motherboard.
It fixes some things, but not many.