A few months ago, I had my harddrive changed, as the old one got scratched so wouldnt boot up.
Everything works fine, apart from the multimedia buttons (play, pause etc) to the left of the keyboard.
I assume this is because a driver is now missing. I have tried searching for it but cant find it anywhere.
Here you can find drivers for your laptop.
Choose Archive - Equium - Equium A Series - select one of the three A100 depending on the number that is printed on the back of your laptop (PSAA4, PSAAB or PSAAQ) - choose operating system and search.