Digital Camera Problems

So I'm taking a Photography class, and at first I was using a kind of old camera. It had some issues retracting/pushing out the lens, but it still took fine pictures and the lens thing wasn't a huge deal. But it took batteries, and my sister had another camera that was rechargeable, so I started to use it. It's a Samsung L100. The Samsung served me well, and as my class is almost over I haven't touched it in a while. It's been in my backpack. My sister took it out today after about a week of me not even looking at it, and the lens made some weird buzzing noise. Now the camera lens takes a few tries to retract/come out, it makes a scary buzzing noise, it beeps and shuts off, etc. The battery is charged, so I don't think that's the problem.

I guess it's similar to the problem with the other camera, but the Samsung doesn't focus and doesn't take pictures. I checked the warranty on it but it was given as a gift in October of '08, and we don't have the box/manual anymore. I don't think the warranty is up but I also don't think they'll repair it if I send it in.

Is there any way to fix it?

 

Maybe you can fix it.
Link 1 (the best answer to me is the last one- but not the best solution)
Link 2

But be very careful. You might break it. Consider taking it to someone to repair it, but if you want to try it youself, be extremely careful.