Purple screen pixles going purple and green, faulty wire help?

[VG150]

My laptop is second hand but about a year ago the screen began going funny. I can still see everything on the creen but it goes purple or patchy purple/green. I had to fix a screen mount about 4 months ago and somehow i stopped it for a month when i took it sll apart. Now its come back worse than before! It appears to be a wire on the left side of my screen under the silver mount protectors (which i have now removed) if i push on the chunky black wires that connect screen to laptop base it changes the screen. Sometimes I can correct it, sometimes not, and occasioanlly it goes black completely. Fed up with it to be honest.

What part could it be that is doing this? I dont want to take the laptop apart again if I can help it as its not the most robust parts!

Thank you any help would be greatly appreciated!

(EDIT) For anyone who has the same problem as this the wire is called a inverter cable. It is situated on the left side of the screen. You have to remove the lid carefully and take the covers off but be careful as to not snap anything!

[mdklassen · Accepted solution]

See: https://en.wikipedia.org/wiki/Primary_color

for details about "primary colours".

Each pixel on your screen, e.g., 1024-by-768 pixels, can have a unique color, produced by additively mixing the primary colours, at different brightness levels.  So, you can read about "24-bit-color", composed of three 8-bit values (0 to 255) that define how much of each of the 3 primary colours are to be used for each pixel.

If the "data" cable between your motherboard and your screen is not transmitting all 24-bits, you get the "purple" (instead of "white") colour, since "white" is 100% of all 3 colors and "purple" is 100%-100%-0% of the 3 colors.

As you wrote, pressing on the cable "fixed" the cable to temporarily transmit all 24 bits.

So, focus on that cable, and its connections.

[VG150]

Thats exactly it! When I put my screen at certain agles it stops too. Thank you for your help, i will seek out a replacment part! 🙂

[mdklassen]

Welcome to this forum.

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