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Re: GE 31GT740 problem
Sounds like you could have a bad Picture tube, as the filaments may not be lighting, as they are open, or maybe a video problem, or perhaps a problem in the Sweep power supply. This is an inexpensive TV set and will most likely cost more to repair then you could purchase a new TV for. Good Luck
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Jan 7, 2010 - 26 posts - 15 authors
Hi, I have a Samsung LN40A550 LCD TV which I have had for just over a year. ... I was watching TV yesterday and all of a sudden the picture went all. ... started makinga very high pitched buzzing sound with no picuture coming on. We did have a bunch of green vertical lines, but now just a black screen.
The spark has damaged the image processor - the entire mainboard (the board that carries the processor and the AV connectors, including the HDMI) will have to be replaced. The board will cost you around £50 - you can buy it from here
http://www.sparedparts.com/products/details/32lg3000_main_board_lg_ebu43398305/ or you can order it at a dealer
For temporary just for testing it ok.. but using banana clips permanently it not a good idear because due to excesive sound vibration it will create static for sure to avoid that you may have to souldering those wired in place to avoid that static and causing eventual damage inside your receiver... any conection as to be well connected special went it time to connect a large amps., beside a turn table, you may look for a good ground.... I suggest to put a solid ground wire also betwen your tv set and your receiver
for eventual hi static discharge., also make sure use a power bar for more protection ...good luck
This is the deal. Your picture tube is going out. How thick is the line. As it gets wider that will tell you how much more time you have. Was the TV dropped? There is a way to adjust this but you have to get into the back of the TV and if the static discharge is not done properly it will kill you. Don't mess with it. It is now cheaper to buy another TV on craigslist or your local paper than trying to repair it. Hope this helps. JimmyC
You almost certainly have a bad picture tube. The green screen was from one of the elements inside shorting out. The static sound you're hearing is the high voltage arcing out through the end of the picture tube to other parts inside the set. It's more economical to buy a new TV than to repair this one.
Sorry to have such good news, but this is one of the ways a picture tube can go bad, and it happens quite often.
The problem you're describing sounds like a tuner problem. BUT you say that you have the
same problem with A-V input too. That's weird!!!
Possibly the electronic TV-AV switching circuit is messed up and stuck in the TV (tuner) position. If this is the case you DO have a tuner problem and a switching problem too.