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12-18-2020, 10:05 PM
(This post was last modified: 12-18-2020, 10:10 PM by cliffyk.)
I would experiment with reducing the "lift speed", both bottom and "normal" layers. Chitubox's default values are too fast, especially the normal layer setting at 100 mm/min--try 60 mm/min for both the bottom and normal layers.
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How old is your printer? Or more specifically how many hours of printing does it have "on it"?
If 250 to 300 hours or more then it is likely the LCD shutter has failed. The LCD is a "consumable" part, only warranted for 3 months (about 2.8 to 3.3 hours per day for each of those 90 days). I had one that failed after just 11 hours, but Elegoo was great about sending me a replacement...