¶ Fault Phenomenon:
After turning on the printer power, the touchscreen cannot enter the menu interface and an error message "erase flash block" pops up.
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¶ Fault Cause:
- The USB drive is formatted incorrectly or corrupted
- The firmware has been abnormally modified.
¶ Tools Required for Troubleshooting:
- A USB drive formatted as FAT32 with a storage capacity of less than 16GB.
¶ Troubleshooting Steps:
¶ 1. Remove the USB drive and restart the printer power.
It is generally recommended to remove the USB drive before turning on the printer power. Turning on the printer power with the USB drive inserted may cause read/write errors. Therefore, please remove the USB drive and restart the printer power.
¶ 2. Re-update the firmware.
a. Download the Mars 4 firmware.
mars_4-v2.1.23-f3-20260408t030134z-3-001.zip
b. Open the firmware compressed package and copy the firmware files (elegoo_cfg.txt / elegoo_lcd.bin / lattice.bit) to the root directory of the USB drive.
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The directory you enter by double-clicking the USB drive icon with the left mouse button is the root directory.
c. Insert the USB drive into the printer's USB port, and restart the printer power. The firmware will then update automatically.
If the issue persists after completing steps 1–2, please contact our technical support team.
Technical support email address: 3dp@elegoo.com