Sprint Galaxy S3 - Power Button Failure Possible fixes?

[Rcrdude64]

So I have an s3 from a while back that I bought brand new and the power button has given out on me the the point where it appears to be stuck on but the button doesn't show that externally, I haven't pulled it apart yet because I haven't had the need to but now that I want to turn it into a media device in companion to my note 2 I was curious if anyone knew of this happening commonly or if there was any fix for this apart from sending it to Sammy to be fixed. I'm not looking to dump money into this thing, just curious. Thanks for your time.