I'm having 2 issues with my Macbook, its a 2.4Ghz 2007 model. 1) The Bluetooth suddenly becomes unavailable for no apparent reason. It just dies occasionally and I can't replicate it. It just dies and I have to restart my Macbook to enable it again. 2) It doesn't sleep properly. Sometimes when I select it sleep the screen dies but I can't restore it back. The external light doesn't blink and remains on all the time. Also it turns really hot as if it were running without the fan. Is this signs of my Macbook already dying? It's still under warranty and I bought Apple Care so any shop should replace it under the event that it does die right?