Green color on Samsung ln-t4042

There are a few things that can cause this. Your t-con board, the signal board or the screen itself. The most likelly and cheapest would be the t-con board. This is the board that transfers your picture from the signal board to your screen. You would have to open up your tv and get the part number from the board itself.

You can get get parts for this tv at www.interliquidparts.com

You may try to get into the service menu and adjust screens/drives level(procedure below). But first turn the color off completely and adjust you brightness to mid-range, what you`ll want to do is a grey raster or bring it as black and white as you can while adjusting the red/green /blue guns or tubes. Also get a piece of paper and pen because you`ll want to record the original values of the items you may change. You want to go into the adjustment menu. Hope this will help Good luck
In quick sequence on the remote press:
MUTE - 1 - 8 - 2 - POWER buttons.

The TV will turn On with the Service Menu displayed.
ADJUSTMENT - TEST PATTERN - SET OPTION BYTE - FACTORY RESET

Select the function and use the VOL+ button to enter.
Save settings and exit by pushing MUTE twice then POWER .

You have a bad LCD control board,It overheats and causes colored lines,screen to darken,or the color go floresent. Also check the power supply for bad caps.
when you have it apart.They usualy go bad on these tv's. It will cause the tv to take longer to come on.Or you have to hit the power button several times to get it on.

1.T-con board or related cables problem -- 60%
2.replace Main Board -- 40%

That's a flaw in the driver/timing circuits, but it could also be something simple like a ruptured ribbon cable or poor connection during manufacturing. Simple or not either way the driver/timing circuits need to be serviced by a professional technician.

I encountered the same problem with a color computer monitor several years ago. Everything went green. The repair techies told me that's a sign that the power supply is going bad. You will not be able to adjust the color. You will have to either fix it or replace it. Hope this isn't a common problem with this model Samsung TV.

The tv has 2 focus adjustments for each tube, mechanical and electrical.

1. Mechanical focus is set by looking at screen from back (through inspection plate on back of most samsungs) and rotating the lens assembly on CRT. loosen wing nut and turn lens assembly to go through focus and back to best position.

Put convergence pattern on screen and manually misadjust bottom red and green lines convergence so they can be seen through inspection hole.

With back cover of TV off you can usually reach your hand up beside the lens assembly to loosen the wing nut then rotate to adjust. Green is in the middle. The focus will be obvious when you rotate and look

When you are finished make sure the foam dust protector is not over any of the lens assemblies and the wing nut is tight.

2. Electrical focus - located at front of unit. the front grille/speaker cover is removed and maybe a cover over the front crt inspection hole.

In the inspection hole there is a black plastic "Focus/screen adjust Assembly" with 2 rows of 3 controls.

One row is focus and the other is screen. The middle controls are for green with R/B on either side. Usually the controls are labelled as "focus" and "screen". You want to adjust the focus controls, one for each color. Look for the focus or screen label imprinted in the plastic. Don't play with the screen settings.

With the same misadjusted convergence pattern you can see a red, blue and green line. Adjust green focus and watch green line for best focus. Do same for other 2.

Screen adjustments are very exact and delicate. The easiest way to deal with them is to turn color off in Customer adjust menu. Put any color tone adjustments in the middle (low, med, high, put at med).

You should have a b/w picture if there are no crt or other color related faults. If it is close to B/W leave screens alone.

If the pix is too green, then the green screen setting must be reduced a small amount. Do not play with these adjustments as most TV repairrers have a difficult time adjusting them.

If focus adjustments don't help then focus control or CRT may be defective. Needs expert to determine.

easyab

http://calgaryconvergencerepair.weebly.com/convergence-ics.html

go here they are adjusting speed of the color wheel

Neither can I, i have the cable box going into component 1 and the regular cable going into cable input, should work because they are 2 different signals. Any suggestions?

if your tv is on warranty take it back to the agent who you buy it from.if it is out of warranty have a tech look at it for repairs.goodluck.