Wendy I think because I can't see too well, that maybe I look closer and so spot things others may miss first time round.
My son is even better at it than I am, he never ceases to amaze me what he can do and picks up.
For example; he can by just feeling around the back from the front, take all the connection out, undo all the screws and take the back of a computer. lift of the case fix the 'puter or add a new part and put it all back together again, he has had no training just pick it up himself.
I use him all the time, he's better than any shop IT person I know. We got a new computer real cheap a few years ago, because the shop IT chap said he had tried everything to get the sound to work and it still had no sound. Dean took it home and with in an hour I had a new top of the range 'puter with sound for half the price...LOL
Sorry to go off topic I just had to be like any Mom and brag...
Chris/Pom