I bought a faulty Sonos ZP100 which had previously been opened. I therefore had no option of a Sonos repair or out of warranty exchange. I couldn’t find a guide to strip the unit down so worked it out myself. I have since written a guide which will hopefully help someone in the future but I accept no responsibility for any damage caused by following it. At the end of the guide I have written a small explanation of the repair needed for my unit which appeared to have suffered a power surge and no longer powered up. Please feel free to improve or alter the guide. Thanks.