Picture is dark...displays as mostly and redish brown wondering if picture tube may be the problem

That is an LCD display television and they used a CCFL tube back light sytem. When you look at the picture if the WHITES appear to be orange or yellow tinted, the issue is the tubes going out. IF the color looks normal then the issue is the back light inverter getting weak. https://www.shopjimmy.com/westinghouse/sk-26h735s

Yes it has a picture tube.
My LG 32" does the same thing and has for several months. I just turn it off and back on again and it goes away. We will get a new tv instead of fixing it.

Oh dear.

It sounds like you have magnetised the screen by placing something magnetic too close.

Your only hope is to unplug the TV, and remove ANYTHING magnetic away from it, such as speakers etc. Give it a few hours then retry.
If this has been going on some time, it will already be too late.

The other possibility is the tube could be going!

If its the one indicated here or one like it :

The picture tube type (CRT) rear projection tubes require annual cleaning.

With set off and back removed locate the three large black lens atop the chassis--hard to miss them.

The are the red, green, and blue tubes and are your light source for the picture---------if dark and they are dirty or dusty the picture will be darker and not as sharp or clear as it once was..

spray some glass cleaner on a paper towel and wipe them clean.

Do not touch anything else in set and do it with set unplugged.

put back cover on and see if picture is noticeably improved; if so do it once a year or more if in a dusty place.

Let me know if you have questions.

i have a problem with kv ha 21 m 80 t. i change the colour ic but colour are not good dot have any pre set to controll. is it controliing from the biase trassistors. green gun is not workin propaly

In the Sony TV a dark display is generally a bad picture tube. I have seen many of these and thought I could correct it with a deflection repair. I would next put the main board in another TV and saw that the board was just fine.The TV had a good picture.You can bet you have a picture tube that is bad!

FIRST YOU NEED TO LOOK INSIDE THE UNIT FROM BEHIND WITH THE COVER OFF AND SEE IF THE TUBES ARE LIT. AT THE BOTTOM OF THE TUBES BY THE CIRCUIT BOARDS, SEE IF ALL 3 ARE GLOWING ORANGE,(FILLAMENTS). IF THEY ARE ALL THE SAME THEN LOOK INTO THE LENSES AT TOP AND SEE IF THERE IS ANY LIGHT INSIDE. THESE SETS ARE COMMON TO HAVE BAD SOLDER CONNECTIONS ON THERE CRT BOARDS. EITHER LOST THE FILLAMENT CONNECTION OR LOST THE VIDEO DRIVE SIGNAL. LET ME KNOW, WE CAN GO FROM THERE. CAN YOU USE A SOLDERING IRON?

If you use a scart connection then make sure it's in the connector tight. A loose scart lead can cause display problems.

These sets have been known to have loose welds in the picture tubes. Most likely your tubes are showing this problem.

Hi there!
Have you checked for dust on the Tubes and mirror? This may cause a bad picture quality. Also power supply related problems like capacitors can cause a dark picture. Try replacing some of them in the power supply area and line stage.Also adjustments in the service mode,but for this you will need the service manual. Good Luck,JUS004