Some regions on the laptop screen are a little pinkish. The same pinkish effect appears on the external monitor connected to the laptop.
Video card failure.
Possible troubleshooting steps and repair solution:
When the same video defect appears on both the internal LCD screen and external monitor, most likely this is related to the video card failure.
In most laptops, the video card is integrated into the motherboard. If the video card fails, it’s necessary to replace the whole motherboard.
If the video card is a discrete module, you can replace just the video card without replacing the motherboard.