*Help* Do I need to un root to take in for service?

[uofajac]

i think some dust got into to my ear piece on my evo and now my phone calls are all muffled. They can hear me, but they sound like crap on the other end. I need them to check my speaker to see if it needs to be replaced. Will they turn me away once they see I'm rooted or is this a separate hardware issue? If so, is there an easy way to un root so I can take it in without issue?

I'm running OMJ's 4.5 rom. Thanks for your help guys!