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Pink and white vertical stripes across screen High Sierra on laptop. Troubleshooting

Joined
Jan 8, 2021
Messages
1
Motherboard
Hewlett-Packard 167C
CPU
Intel Core i5 2450M
Graphics
Intel HD Graphics 3000
Hello! I'm installing macOS High Sierra on my laptop HP ProBook 4730s. I'm installing it by "OpenCore install guide" by Dortania. As i see my hackintosh works well, except one thing - there are always wide pink and white vertical stripes across the screen (by the way, sometimes when i run macos the stripes are green and white). (of course my screen doesn't have them on Windows)
Dortania's guide says i should enable CSM in my BIOS to solve it. SharedScreenshot.jpg
But the problem is there is no csm (or sth like this. E.i. Boot legacy ROMs and etc) function in the bios, because my laptop doesn't support it.

How can I activate CSM function not by using bios (e.i. kexts or drivers or anything else (I don't know))? Or how can I solve the problem by other way?

By the way, i can't see the full screen - only a half (i see only the left part).
I'm using OpenCore 0.6.4.

Please, could you help me?
 

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