(Built in) TV GUIDE Screen is black except for small channel preview window on top-left.

After purchasing a "service remote" and then buying a new "Main Board-Analog" which didn't fix the problem, I spoke with tech support who then emailed me an "EPK" file. Basically the computer board inside the television needed to be updated since this whole digital conversion is happening.. However this incident has given me tremendous knowledge of what to do and how to troubleshoot and how to reset my own TV with all the hidden menus that you never knew you had. Don't be tricked into buying a mainboard or even paying a diagnostic fee. If your TV GUIDE screen goes blank and all you see is a small channel preview screen in the top left corner, chances are all you need is the EPK file update. I received the update file in my email, I downloaded it to an SD card, inserted the SD card into my 32LX1D LG LCD TV and it did the rest. It was too easy. Most newer LG TV's are coming with a "SERVICE USB" so you can attach a "jumpdrive" or some other storage to it. These so called "Authorized Service Centers" are a hoax. WHen you bring your TV into them they charge you a "diagnostic fee" ranging from $50-$150 just to diagnose it, then they tell you that that can also be applied to the cost of the repair. All the service center does is call a special priviledged tech support 800# for LG to find out what to do. I've replaced and removed my own Main board. You gotta learn the game people, its all a big game to keep the revenue coming long after the sale of the TV. Which is why nowadays automobiles are manufactured with parts that were made to break intentionally to keep bringing you back.