Question about Flat Panel Televisions
I bought a Sony Bravia KDL46X2000 LCD TV in Sept 2006. Since May this year, the tv will switch off & on automatically while it is on. Normally, it happens more frequent if the tv is on for long hour. For example, if the tv is on for three hours, it may happen four or five times in between. The Sony authorized repairer already changed the tuner for two times, the problem is still existed. I just wondering if the problem is with the power supply ?
SOURCE: Protron PLTV-32CM LCD no picture
This TV set is still under the warranty and it seems proton has no local service available to you. I know its to late to tell you this but anytime you purchase a set, ask first and see if there is a service local to you. Ok enough of that noise.. I would go back to the store where it was purchaced and ask them if they know of any local shops that handle the warranty repairs.. If you want to pay for the repair, and that will most likly be alot for a flat panel set, You will have to call back proton and ask about the shipping cost and whos responsible for that.
Posted on Sep 30, 2006
If you are using a set top box this might be caused by turnig the box on at the same tie as you turn the tv on or slightly after you turn the tv on. If you are using compnent or HDMI inputs the set needs to see the signal as it is turned on to know what formt the signal is in.
Posted on Oct 23, 2007
If TV does not remain in standby and turns on itself then power switch on top of it could be defective and power supply board is also suspected. Take off its back cover and unplug top switch connector just to confirm is that cause of On-Off its own. If problem still exist then power supply board has problem and will be replaced. Let me know the results to move forward.
Posted on Jun 13, 2009
If you bought it brand new from a dealer, I would take it back or have them come out and look at it. Less than a month old, it is still under the 1 year MFG warranty or the very best a 30 day one.
Posted on Jun 22, 2009
Horizontal lines are relatively rare problem in LCD TVs.
The likely problematic areas are:
1) The LCD itself (the micro ICs embedded into the LCD panel structure); that doesn't sound likely based on what you say, but it's not completely impossible. The bad news is it's mostly uncurable.
2) The power board A-1511-322-D G5
Power boards may sometimes cause problems with display, although rarely causing horizontal lines.
I wouldn't start looking here either, but it is certainly a problem to consider.
3) Main board 1-876-561-13 R1506072C
Slightly more possible and yet not quite likely. A high operating temperature and bad SMD soldering process may cause some soldering contacts on the main board to behave differently when the board is cold versus when it heats up. It is very common and may have all kinds of different effects on the TV and the screen.
One way to check for that is with a regular dryer..the process is explained in many other solutions at fixya and around the net, so I wouldn't repeat it here...but it takes time and patience.
4) The most likely place to start with is the T-Con / LCD controller
I'd first replace that and see if the problem goes away.
5) There's a very minor chance that the LVDS cable that connects the main board with the T-Con does not make good contact initially and changes that as a result of getting hot. It's easy to just touch and move it lightly when the TV is still cold to see if it has an effect on the picture.
Sorry I couldn't just nail it for you, but that's the nature of the repair businss :-)
Posted on Mar 15, 2010
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