Hey guys, I'm a new member here and I was wondering if I could get help with a problem that I'm encountering on my Macbook. I just got it last year, and it's been just fine until now. The other night, I left it on to download some music when I went to bed, and I've done this many times before. And because I was going to bed I turned the brightness all the way so it wouldn't keep me up, and same with the volume. The next morning, I tried to turn up both, but neither reacted. I let it sit for a few minutes and nothing happened, so I decided to restart it. So I turned off and back on, and it started loading just fine, seeing the apple and the loading wheel, but then when it switched to the blue screen, it stayed there. No OSX loader came up, nothing, just the blue screen. I didn't notice anything strange other than that, so I tried it again, and the same thing happened. I decided to let it sit for a few minutes to see if that helped, and it did... kinda. I was able to get logged on and start running programs, but after being logged on for about 2 minutes, it decided to freeze. So every time I start it now it goes through one of these situations, though the latter could last from minutes to hours. And I also happened to notice that whenever it gets stuck at the blue screen, there is a faint clicking sound. So would anyone happen to know what might be wrong with my Macbook? I think it could be an over-heating issue/hardware error, but I'm really not sure...