Hi... I have an H-23-700 DVR unit and last night it just quit. I called Directv and they are replacing it but I want to try to get my unit working again. It acts like it has a blown fuse. It just stopped working and will not power up at all. No lights... just dead in the box. I pulled the case off and near the power supply it says "replace fuse as marked" but I do not see or understand how to rplace teh fuse. It appears that the fuse circuit is soldered in or it is hidden somewhere so its not easy to do. Can someone please advise this wheelchair user on what I might try to do. THANK YOU!