1.) You can pop them back on, using a dab of crazy glue if need be.
2.) I don't understand the question.
3.) It sounds like the hard drive is physically failing. I'd recommend backing up all of your important files immediately. (Use floppies, CDs/DVDs if you have a burner, an external hard drive, a local network, or a flash drive.) After that, you'll need to purchase a new hard drive and replace it.
Hope this helps,
Hi everyone! I have a tecra 8100 that can use a bit of help, if you know how to fix any of these, please email me at email@example.com
1) The Fn and right arrow keys are broken off, can they be put back on?
2) It has a floppy lid
3) It's hard drive is always making a grinding sound