Question about Samsung LN52A850 52 in. LCD HDTV
Just purchased 12/08 when sits overnight or all day and first turn on, get no picture but get sound. Cannot get the menu to appear on screen nor input sources so this indicates not a problem with the cable box but with the TV itself. If I turn the TV off for about 30 seconds and turn back on I get a picture. What could be causing this, Im thinking of just taking this back to Sears. It worked fine for first days but started acting up a few days ago.
SOURCE: samsung tv turning off by itself
I have the same problem of the set turning off and on by itself. There is a circuit in Samsung TVs that would shut it down if a very loud noise occurs in the program being watched, but I have not noticed that correlation. My problem is solved by vacuuming the back panels of the set. They do not seem to have any significant dust on them, but I think the vacuum sucks somewhat inside of the TV and does some good with the fan that is supposed to be cooling the bulb and the mirror. It seems to work for months on end and when the problem recurrs, I vacuum again.
Posted on Oct 28, 2008
Not sure if this is the same problem, but I just moved and set up my Samsung 40" LCD and it has been going off and on by itself with the worst yesterday every 2-3 minutes. After speaking with a friend of mine who is not in the Tv business but just has good common sense, I determined it was likely a bad power strip. The bottom line is I replaced the crappy power strip (which was fully loaded with all 6 outlets in use) with the higher quality one I had in the other room. The problem is gone. I suspect the power strip was failing or real bad quality........try plugging the tv directly into the wall outlet first. hope this helped.
Posted on Sep 18, 2009
SOURCE: Samsung LCD 40 inch LNT4061
It sounds like you have a Power Supply Board problem. The PSB is the center Board (towards left) after you remove the back off the TV. Remove Board from TV with the 6-7 screws. Replace capacitors CM852 & CM853; 2200ufd 25volts.
Thanks for using FIXYA, big IRISH.
Posted on Jan 02, 2010
Firstly and would remove all the leads from your TV and check them. If after checking your HDMI leads etc... and its still the same then i would reset the TV to the original Samsung settings. This is completed on your remote control by the following........
Turn your tv to standby, on the remote when in standby press the keys on the remote in the following order........ INFO.........MENU..........MUTE.........POWER ON.
You will now notice the picture comes on with the engineers settings in the background. With the direction keys on the remote scroll down to number 12 (RESET) Then press OK or the right direction key, Your tv will switch off and load the Samsung factory settings. Switch the TV back on and go through the setup procedure.Once completed then try your HDMI again.
If it is still failing then there is a strong possibility that your Eeprom IC on your main AV Board is corrupt and needs replacing. This should only be attempted if you have good soldering skills as they are Surface mounted and very small.
My advise if your skills are not that good is just to replace the main AV board (Scart Board) these usually sell for around £50 but WILL solve your problem.
I have gone trough everything i know here that would cure the fault, most times one of the above three will cure this, but im afraid other times its just time for a new AV board.
Hope iv helped some people out here.
Any comments or thumbs up appreciated.
Posted on Nov 18, 2010
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