First of all, the title is in jest. I'm expert enough to be dangerous, in spite of the associated and high-falutin' titles I've held.
However, I'm patting myself on the back today for having repaired the "click" bar on my laptop. It's been uncooperative. I took a kitchen utility knife to it. What I actually did, so you have these handy instructions, is stuck to blade down around the edges and just repositioned the left click part of the bar. It probably had loosened over the years. So, never give up! We can get things fixed.
In case your CD or DVD player won't open, unwind a standard paper clip and take the end of it, poke it ever so slight into that little opening next to the open/close button/bar. That should free it up. That's an old trick but one you may not know about and could end up needing.