20 Most Recent Samsung LE40R74BDX 40 in. LCD Television - Page 8 Questions & Answers

If you remember 'snow' from your old TVs, this is the digital equivalent of that and is caused by either external interference or by a semiconductor in the video chain (I assume you aren't hearing audible noise) that has gone 'noisy' and is producing random noise.
It is possible that the problem is associated with the LCD panel since most of them are now equipped with the final electronics that control what you see.
I think most service shops could find the source in short order as they will be equipped with at least a basic oscilloscope that could be used for signal tracing.
Just to make sure that the problem is internal to the set, you could attach a coaxial (shielded) cable to the 'antenna' input, remove all others, use a paper clip to short between the center pin of the free end of the cable and the outer shell.
If the spots are still there, then the problem is in the set. If it isn't, you will need to do some sleuthing as to possible sources of this random signal. This may not work if your set shuts down the video path when no signal is present but most warn then with either a blue screen or a legend that states 'No signal.'

sorry its [email protected]

If you just bought it and you have check the signal source and its ok contact auth Samsung serv company. Samsung has 1 year parts and labor warranty. Some retailers will exchange it if it's you just bought it.

if u have placed your DVD next to your tv ... just maintain distance between then and check out

check out input for video, make sure your color code is right, and if you using a receiver check your inputs and color code

sometimes the power cord comes out behind tv , the power outlet is bad in the wall,

take cover off of box keep tv in fome take a drill with a long shaft turn down the clutch on drill and unsrew then lift up with 2 people and tilt back and let srew fall out you (you may need a flash light to see srews)

take base to home depot match srew pattern

Remove the screw and pull the TV upwards.
Have someone step on the stand

Phil.. to reset: Info>Menu>Mute>Power Button make sure tv is off to start with! messing around in here could void your warranty..it resets the tv to manufactures settings. if you just want to reset freeview.. 0 0 0 0 then press the colour buttons in sequence.. im having a much bigger problem..i think my freeview has blown on my LE46m87bdx..its only 1 month old..i turned it on and it went crazy..then no more channels..no signal..and i get a max bit error with 0 signal strengh..add to this with the fact that the screen goes crazy and resets on the DTV mode..ive got a service person coming round on the weekend! if it is blown..then ill have to do without freeview on the tv...im not letting him take away the tv...no no no no no!

im having the same problem, i have had this television for 16 months now. its not just happening when i turn it off but also when im changing the source

I also got a black screen! I then turned the TV off, pressed TV and while it was lit, quickly pressed info, menu and then mute. Then switched the tv back on and amazingly......the menu was there. Go to item 12 and reset. I am please to say that we are back in business,

If its just dirty marks use a solution of 50% deionised water and 50% isopropyl alcohol. Use a lint free cloth and it should lift the marks. Any household polish etc may react with the LCD surface and burn it. If you cant get hold of isopopyl go for branded cleaning kits for LCD TV screens. You'll get these in most electrical stores.

Calum

I had the same issue with my Samsung LN52A550. The 4 screws holding the TV stand are quite small and deep inside the holes. You can not take the stand off without take them out completly. I tried to remove them with magnetic screwdriver, tweezers but didn't help. So, by laying down my TV on its back on my sofa letting the TV bottom and the stand parts outside and lay down beneath to unscrew them again. With the grativity, some screws fall out right away, some may need unscrew a little bit more or shake the stand a little bit. I could say it's a very bad design about this screwing system. So, good luck then.

it depends on what your using it for, adjust colour tones to what you think looks natural, contrast between 80-90, keep sharpness below 30. just have a play around till you find what best suits the source material.