Question about Samsung LN-T4042H 40 in. LCD HDTV
You will most likely need to get the set diagnosed. Sounds like you have a backlight problem. Backlight problems could be cause by a fault in the power supply, main board, inverter board, bad CCFL lamp, or a short in a HV(high voltage) cables. I would say it's worth getting a proper diagnosis. However, if you choose to replace the set, you can get a pretty penny for it on Craigslist. If it is clean and come stand and remote, you could get as much as $100 to the right buyer!
Posted on Oct 30, 2012
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Posted on Jan 02, 2017
SOURCE: blackout problems
It could be the LVDS cable that is connected between the logic main board and the main board, sometimes this cable is too short and comes loose from one of the boards, it could also be a sign that the logic main is going out or the panel itself is shorting out
Posted on Feb 17, 2007
check if the back lamps are still on when you lose image, all you have
to do is get close to the screen and make is totally black and if is
not that means you have a back light working, but if the back light is
gone you may have a defective panel.
talked to samsung TA about the same problem I had and the recommend to replace the power supply first to confirm a defective panel because a panel is quite expensive
Posted on Jun 15, 2009
there is a soloenoid type switch that fires the TV up this has failoed. its like a neon or fluoresecent tube that has a faulty starter switch light tries and tries but never quite makes it when it does get going it has that purple smear in the tube. that is the simple explanation for your problem. part is about $60 labor is unkinown as i am not in USA but looking at some of the rip off charges I am glad i dont have the bill
Posted on Aug 20, 2009
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