While I've not experienced similar issues on my Mimas and Muses, I want to say that it could be an issue with the lighting and/or touch layers, and/or the adhesive holding any of the display layers together, as I've seen similar issues with older TFT LCD panels.
I know there's at least one seller on AliExpress selling replacement display assemblies for the Mars (likely as surplus from manufacturing), but it's a little expensive, around $200-300. (EDIT: it's sold out, but the seller name is "HuaTaiJia")
Last edited by MustardOrMayo; 09-14-2020 at 10:30 PM.
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