Macbook won't start up
sign appears in its place and nothing else happens. I switch it off and try again - same thing. Is this permanent? Am I able to get it fixed easily at an Apple Store? Thanks for any help.
Perhaps related to this, occasionally recently my computer has been running very slowly (as in, a minute to process a mouse click). Also, sometimes it shuts down with more than 10% battery power left (only if it's not plugged in), it seems particularly if I am doing some apparently high-consumption work (such as using Garageband or opening photos, etc.).
Intel Black MacBook, Mac OS X (10.4.11), Black MacBook