Questioning if i should send it back for repair/replacment

Ok well i havent played my 360 in a while (been playin my other systems) and im getting a little worried.

First things first is that it has a new face plate, the standard stock one wont go back on right...it just has the on/off button sticking in all the way so it wont turn off.

Second- i dont know if its because im used to the other systems,, but when i put 360 games in my 360 makes weird noises somewhat when its reading the discs, almost like grinds but arent grinds...its weird.

And when i was playing oblivion it froze once and it has never done this before.

So my question is, should i send it to them to get them to replace it or repiar it because its acting weird? or is this normal and i should just stop worrying.(besides the face plate part, wondering if theres a way to fix that) 

I'm pretty sure that you want a problem that happens all the time with your 360 before you send it in. but if it continues to freeze, then you should send it back.

but when i play my games, it makes that sound too, and I have a lot of friends w/ 360s, and they have even worse noises, so I think that as long as it isn't waking somebody in the house up, it is just the abnormally loud drive.