If you search the previous post here, a lot of us already send DHD for the warranty. Seem like the volume rocker is prone to damage. Big design false. You may want to unroot back the phone for warranty just in case they check.

Just use the search column below with keyword 'unroot'. There's several method, you can choose which one you prefer.
You sure or not you use DHD. Your sig still on wildfire 
Btw, need to know your firmware.