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white people's complexion turns light blue

The facial complexion of white people has turned light blue twice, and red' s turned bluish at the same time. I turned the set off for and back on the color was corrected. Can you diagnose with this info?

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Hi,

At a guess you either lost or had a lower power than required colour signal. Most probably it was the green colour signal, as blue and red were still in evidence.

White is composed of the 3 colours used in TVs (and monitors etc., i.e. red, blue, green) being all on at 100% power at the same time.

All the colours produced in a TV are made up of the 3 colours, having various power percentages, in relation to each other at the same time. e.g. 35% red 50% green and 80% blue will produce a slightly different colour to 40% red 45% green and 75% blue.

There is a lot of information online on how the colours are combined to form the required colour.

Given that the problem was 'solved' by what was effectively a "power reset", as most TVs nowadays are software controlled, either some software was stored corruptly or perhaps the components that apply the colour signal power might not have had the correct power applied to them at that time etc. There could be a myriad number of reasons as to why it occurred

As it was intermittent, at the moment you can only wait to see if it happens again and then hopefully if it actually stays that way. With the problem in evidence all the time it will be a lot easier to track it down. Initially, you could try unplugging the TV from the power and removing the back off it and do a visual inspection of the boards and connectors, especially the power board, for anything obviously amiss such as bulging capacitors or stressed (heat affected) components or anything loose, but this may prove inconclusive if it all seems OK.

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5 Comments:

Sometimes loose board mounting screws can cause wacky problems such as this.

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Are you kidding? I have no idea what you just said. I'm an 81yr old woman who knows nothing about tv's.

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Hi @ sharon roberts

What is the model number of the TV?

Most TVs have picture colour settings that can be adjusted by the user to suit them.

Go to Menu > Picture > Colour Temperatures (it may be under Advanced settings)

There are usually at least 3 colours (red/blue/green)that can be adjusted sometimes even more, (cyan/purple etc)

Write down what values are there already for each colour and then adjust each colour, up or down, one at a time and check what the effect is when watching.

Do not make big changes to any one colour. Do it in small steps only.

By having written down the original settings you can always go back to what is was before you started, if you can't get the overall colour you want

If you can't get the correct overall colour by adjusting the colour settings then it may be an equipment problem and it may be better if you contact a reputable, professional TV repair service and have them look at the problem rather than trying to fix it yourself.

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I have a CRT TV of onida. When I power on my television then whole screen shows greenish but picture is available and its perfectly visible.

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@amanraj24nov

What is the model number of the TV?

Does the TV menus have a picture colour adjustment option in the Picture menu?

If so try adjusting the colours to get a better picture.

Having a green tinge means that there is a problem with either the red colour or the blue colour as all 3 colours are used to create white.

So back off the green so it is not so predominant.

If there is no colour adjustment option in the TV menu > picture settings then you would need to find the schematics for the TV.

Be careful if you work in the back of a CRT TV as there is very high voltage on the CRT tube. It can be very dangerous if you don't know what you're doing

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