Dark LCD, Image Retention, Circular backlight - Heat Damage?

Hi there, this switch seems to have some display issues which I am wondering if someone could help me with. I am planning to open it up this weekend but I would like some prior guidance if possible.

In handheld the brightness is on max but the screen is still very dark. There only seems to be proper backlighting in the very middle circle of the screen?

When the console is playing games everything is very very dark as shown below with Pokemon. There is also a very solid image of whatever has been running for a few minutes prior overlaying everything as well

Apparently, the switch was left in standby in a blanket for a long duration.

From what I can guess it seems like it may be damage from overheating and some major burn in? Would this be an LCD replacement or could I possibly fix this by re-seating a ribbon cable?

Thanks for the help.

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This is a comparison with a normal switch.

Pokemon, on max brightness.

Burn in? After running Pokemon for 2 minutes.

Edits: I changed my post as I realized my TV was also broken and it wasn't the switch.