I have only tried the battery. I didnt want to take it apart as it is my girlfriends as she would freak if something happened while it was apart and I was to blame...
That's totally understandable. I mentioned these parts because these can be removed with relatively small effort. Beside these, I can't see too much sense in taking the computer apart, since you wouldn't be able to do anything about e.g. a motherboard fault anyways.
So I wouldn't recommend to do anything remotely drastic, like taking out the hard disk. However, if you (your girlfriend) has important files on it, this might prove to be the only way to access them, that is putting the drive into an external usb enclosure, and connect it to another computer. Just food for thought. (And if you send the computer away for repair (maybe on warranty), this is also worth a shot, since you might get it back exchanged/restored to factory default.)