A lot of your local TV guys are involved with installing DISH and Direct TV satellite systems for HDTV.
If you have a HDTV and it fails like your monitor, who do you think is going to fix it ??? The CSR at DISH ????
Even if you do manage to find the bad part...... the odds are you will not be able to find a part to fix it! That is why you take it to a professional........ or buy a new one!