Yes it's user serviceable. HP support asked me to remove and reseat the power supply to make sure the noise wasn't vibration, additionally the guide that comes with the microserver shows you how to remove and replace all the major components. So yeah there's no voiding of warranty by pulling the thing apart - so long as the parts remain intact (i.e. you don't open the PSU, take the heatsinks off the mobo, etc) then your warranty still stands There's next business day replacement on parts. So if mobo/ram/hdd/psu/fan/case dies- you get a new <part that is broken> shipped to you.