well if you want to do it yourself, begin by typing the name and model in to google, and reading, try to get a manual ,service manual, Sonys have blinking power lights that give a code if something is not working. There should be some clues, you have to know what to look for. And there are discussion boards for that monitor out there I saw them typing in your model number into google, you just have some reading to do before taking off the back.
http://www.avsforum.com/avs-vb/showthread.php?t=1061724
Link has a service manual posted, with dis assembly instructions.