Eli5: What is the purpose of the different colored bars on the tv error screen? Why not just have a black screen that says ‘error’?
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Coloured bars are very useful for adjusting the TV’s colour. If you take a transparent dark blue filter and put it between you and the TV, every other vertical bar will be blue.
Without the filter, you’ll notice a small part of the coloured bars has a few of the colours in reverse order from the rest of the coloured bars. But with the filter, the colours all look blue.
Well, almost. You’ll notice some spots are more blue than others. That’s where you adjust the TV’s colours.
Call up the TV’s colour controls and find the “Tint” and “Color” sliders. Move them around and see how it affects the bars through the blue filter. Your goal is to make the big and small bars appear to be exactly the same brightness.
Once that’s set, your TV’s colour is adjusted properly!
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