How to fix vertical white lines on 2017 MacBook screen?

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This is what my computer looks like when I start it up. I unplugged it this morning and then opened my screen up to this. The white lines seem to be heavier wherever there is an application open/app icon on the screen. When I shut down my computer the white lines go away and it goes fully black once again. How do I fix this problem?

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Did you have a liquid spill or sit the system down on a wet surface at some point?

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@danj Not sure but very unlikely. I took it out of my zipped up backpack this morning and then this happened.

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Are you able to plug in an external display to see if the internal display or its the GPU that failed?

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