¶ Fault Symptoms
¶ No Display
After running the Exposure Test, the LCD Screen remains completely black with no image displayed. The UV light may remain off, or it may turn on while the screen still displays no image.
¶ Partial Display
The LCD Screen only displays part of the exposure pattern. Symptoms may include missing edges, black areas, or incomplete images.
¶ Dead Pixels
¶ Screen Flickering
¶ Lines on the Screen
¶ Possible Causes
- The LCD Screen has dead pixels, physical cracks or damage, or other display defects.
- Resin leakage, cured resin, or debris is present on or inside the LCD Screen.
- The LCD Screen ribbon cable is improperly installed, has poor contact, or is damaged.
- The printer firmware is outdated or incompatible.
- The LCD Screen itself has failed.
¶ Troubleshooting
¶ Check the LCD Screen Surface
¶ Step 1: Inspect the LCD Screen for Physical Cracks or Damage
When the LCD Screen is not exposing, carefully inspect its surface for cracks.
If cracks are found together with dead pixels, the LCD Screen should be replaced as soon as possible.
To help prevent future LCD Screen damage, follow these recommendations:
- Filter the Photopolymer Resin before every print.
- Run the Clean Tank function after every failed print to remove cured resin from the Resin Tank.
¶ Step 2: Check for Cured Resin or Debris
If the LCD Screen surface is not cracked, inspect both the LCD Screen and the Fresnel lens for cured resin, dust, or other debris that may block UV exposure.
¶ Check the LCD Screen Ribbon Cable
¶ Step 3: Locate the LCD Ribbon Cable
Go to the following page and find your printer model to access the disassembly instructions and locate the LCD Screen ribbon cable:
https://wiki.elegoo.com/video-tutorials/parts-replacement
¶ Step 4: Inspect the Ribbon Cable
If the LCD Screen shows No Display, Partial Display, Screen Flickering, or Lines on the Screen, first turn off the printer using the Switch and unplug the power cable or power adapter.
Then perform the following checks:
¶ Verify That the Ribbon Cable Is Fully Seated
Make sure the LCD Screen ribbon cable is fully inserted into the LCD connector on the mainboard and securely locked in place.
The brown side of the ribbon cable should face upward.
¶ Verify the Cable Orientation
Some printer models require the ribbon cable to be installed in a specific direction.
- The side labeled LCD or SCREEN must face the LCD Screen.
- The side labeled MB must face the mainboard.
¶ Inspect the Ribbon Cable for Damage
Check whether the ribbon cable has cuts, tears, severe bends, or damaged connectors.
If the ribbon cable is damaged, replace it with a new one. Do not continue using the printer until the cable has been replaced.
¶ Reconnect the Ribbon Cable
Disconnect and reconnect the LCD Screen ribbon cable, then ensure that the connector latch is securely locked.
¶ Update the Printer Firmware
If the issue persists after reinstalling the ribbon cable and there is no visible damage to either the ribbon cable or the LCD Screen, update the printer to the latest firmware.
Download the latest firmware from:
https://wiki.elegoo.com/en/download-center
After the firmware update is complete, run the Exposure Test again to check whether the LCD Screen displays normally.
If your printer model is not listed on the Download Center, update the firmware to the latest version using OTA.
¶ If the Issue Persists
If there is no visible damage to the LCD Screen or its ribbon cable, and the problem remains after checking the ribbon cable and updating the firmware, the LCD Screen is likely faulty and should be replaced if any of the following symptoms persist:
- No Display
- Partial Display
- Dead Pixels
- Screen Flickering
- Lines on the Screen
¶ Help us improve
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