The most common question following a firmware update is: "I flashed the Two Trees Sapphire Plus firmware, and now the screen is blue/blank."
Mastering Your Two Trees Sapphire Plus Firmware: The Ultimate Guide two trees sapphire plus firmware
Do not use the Two Trees GitHub (it is stale). Use the official Marlin bugfix-2.1.x branch. Download the Marlin and config examples from the Marlin firmware repository. The most common question following a firmware update
Calibrate your E-steps, change UI colors, or adjust motor currents for quieter operation. 1. Identifying Your Motherboard Calibrate your E-steps, change UI colors, or adjust
Insert the card into the printer while it is turned off. Turn the printer on. You should see a progress bar on the screen.
The Sapphire Plus uses the MKS TFT35 display. However, the touchscreen firmware is separate from the mainboard firmware. Many users confuse a broken TFT interface with a bad mainboard flash. You need to update both.
April 2026 Subject: Stock firmware, known issues, and upgrade paths