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The left half of my monitor has a slightly yellow hue.

I’ve got an Acer ed242qr where the left half of the screen has a strange color shift. I tried disassembling the unit and reconnecting all cables with no change. I don’t think the issue is with the panel because I powered the monitor up with one of the main board cables unplugged and the monitor cycled through a red/blue/green full screen and those colors seemed perfectly normal. Is this likely an issue with the main board, cables, panel board or other? I have no idea where to begin with this.

Here’s a photo of the issue: https://imgur.com/a/kARt3bS

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Hi @cdaly ,

Have you tried adjusting the monitor’s colours using the OSD menu > color > 6 axis hue or 6 axis saturate to see if you can resolve the problem?

The pure red, blue, green may have been OK because when testing these colours only the appropriate colour pixel i.e. red, blue or green would have been turned on whereas all the colours are made up of a combination of the 3 colours at different power levels i.e. a pure white colour = 100% red, + 100% blue + 100% green.

Here’s a link that shows the % ratio of the three colours for most of the common colours.

If you can’t fix it by adjustment most likely it is a solarization problem with the mainboard (assuming it hasn’t got a tcon board - board between mainboard and screen) that feeds that half of the screen.

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I believe there is a tcon board that is bonded to the panel. You can see the panel with attached board in this youtube video (https://www.youtube.com/watch?v=jEU31oro...). Would that indicate a likely tcon failure or would you still think the main board is the culprit?

par

@cdaly

I don't know about your model but with most the Chroma IC is on the tcon.

It regulates the colours dependent on the signal received.

Check the larger IC chip markings on your tcon board (if there is one) and Google them to find out if it is a chroma chip or not.

It could also be a power problem to the colour drivers (or the colour drivers themselves) for that half of the screen as well. Being yellowish indicates a lack of one of the colours % wise and looking at the colour palette in the link the more yellow a colour the less there is of the blue colour in the makeup then there should be.

This is only a guess though.

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Chris sera éternellement reconnaissant.
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