FALSE
As a corporate Sprint Tech let me give you some great advice.
Unroot it and set it back to all defaults, then come in. We all know what to look for in rooting and we cannot do much work on rooted phones specially if it ends up involving an exchange.
We have 3 main official hardware parts for the EVO. All 3 different manufacturer screens, the phone speaker, and the complete back housing.
Now, me personally since I rooted my employee phone don't mind doing any hardware repair on any rooted phone. But when someone comes in with any kind of weird software glitch, I'm sending them home to unroot.
We get watched as far as that stuff goes and there are repurcussions. I'm also on the internal communications for techs as a special contributor and multiple, multiple discussions of "what to look fors" have been posted to let techs know what people enjoy doing to their phones that are outside the scope of warranty and etc.
Techs do know what to look for, playing dumb gets you no where and we are willing, more than willing to work with ANY customer, even those like myself who enjoy rooting and its awesome benefits, but will request of you that you respect our wishes to work on your phone after it has been unrooted as far as most problems go. I've yet to meet a person that was not willing to meet me in that halfway point and bring any device back unhacked so we could go through the proper procedures. We like our jobs and our customers too, so please respect that we would love to continue doing our jobs/careers and despite what forum goers think of us. We do have families, bills to pay, kids schooling to pay for and can't do that very well when unemployed from sprint for bringing in a hacked up/messed up phone that someone who didn't follow the proper root instructions brings us and decides to take advantage of a new tech or one who missed the superuser app or something else.
It's all about respect with me. I'm a Sprint Tech, a PC tech, and a human being that is willing to work with any customers as long as they understand that we are deploying a 2 way street with this. And come on, if you are smart enough to root successfully, you are smart enough to unroot successfully too and bring it to us back in normal condition so we can help you out, which helps us out.
Sorry if I offend anyone with my post, not meant for it, just putting it out there that we all have a part to play in the task of getting you back up and running again.