The LCD screen or UV light does not light up
6 usi3d guides for “The LCD screen or UV light does not light up”, each with the likely causes, how to check which one is yours and the step-by-step fix, with each manufacturer's official sources.
One applies to any resin printer and 5 are for Anycubic, Elegoo, Formlabs and Phrozen printers.
Each guide summarises the official documentation and says whether usi3d has already verified it on a machine.
Any resin printer (1 guide)
- The LCD screen or UV light shows no image
The printer seems to run but nothing cures: the build plate and the vat stay empty; or areas of the part are always missing in the same place.
Anycubic (1 guide)
- Photon Mono M7 Pro: the exposure test fails or the LCD does not display the image properly
On the Photon Mono M7 Pro nothing cures or prints come out soft or lacking detail, and in the exposure test the image seen on the LCD does not match the one on the…
Elegoo (2 guides)
- Saturn 4 Ultra 16K: the LCD shows no image, a partial image, lines or dead pixels, and how to replace it
In the Saturn 4 Ultra 16K exposure test the LCD stays black, with the UV light on or off, shows only part of the image, has dead pixels, flickers or shows lines.
- Saturn 4 Ultra or Mars 5 Ultra: the UV light does not turn on (often due to the wrong power adapter)
After printing there is nothing cured on the build plate or in the resin tank, and in the exposure test the LCD shows the image but the UV light does not turn on.
Formlabs (1 guide)
- Form 3: defects from a dirty optical window or film, or LPU errors (246, 67, 68)
On a Form 3, Form 3+ or Form 3L, parts come out with defects because the laser arrives diffused or weakened, or the printer shows a communication error with the Light…
Phrozen (1 guide)
- Phrozen Sonic: the LCD shows no image, flickers or the UV light looks weak (LCD test)
On a Phrozen Sonic, the LCD flickers or glitches, looks dim or does not light up, or in the LCD test the image on the screen does not match the touch panel or spots…
Products that may help
Products from the usi3d shop that fit these guides, chosen for the fit and not for the commission. Check that they work with your printer before buying.
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