How can I remove the hard drive from an old HP laptop?

I’ve removed every screw I can see, but the case is still firmly in one piece. There are a couple of removeable covers, but they don’t give access to a hard drive. Everything I’ve seen about disposing of an old laptop says ‘remove the hard drive and launch it into the sun’. This laptop hasn’t been used for many years. I doubt if anything useful could be gleaned from it.