Default Returning

Well I have a galaxy note 3 have had it since launch love it to death. Recently rooted it installed knoxraid and my phone got new life in it. Well I recently managed and I have no clue how but seem to have shorted out my phone where I am unable yo charge it any more. So I have to return it to Samsung. But I have a question. I guess I'm screwed either way as I can not hook it to the computer. But since I didn't trip knox do you think my warrenty will still be valid? Any replies would greatly be appreciated and for the time being while I am without my Note 3 I am switching over to the LG flex. Which at this point has no custom ROM.