LCD screen problems

[cliffyk]

"have been printing constantly for 7 months" says it all, the LCD is shot--they last just 350 to 500 hours on printing on the Pro (250 to 300 on the plain ol' Mars), the near UV¹ curing light causes the "liquid" crystals, to solidify ans they can no longer twist to pass or block the curing radiation as needed. This is not an exclusively Elegoo problem--it is a limitation of the technology. I believe the 405 nm "near UV' colour temperature was chosen in part to minimise the degradation.

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¹ - 405 nm wavelength light is not UV light, is visible light at the lowest "end" of a human being's visible spectra--true UV begins at 390 to 395 nm.