Some popular firmware customizations for the Two Trees Sapphire Plus include: two trees sapphire plus firmware
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.
Most units ship with an MKS Robin Nano (V1.2, V1.3, or V3) . Z-Axis Revision: Gen 1: Belt-synced Z-drive with one endstop. Gen 2: Dual independent Z-axis motors.
In your Marlin Configuration.h , ensure: #define BAUDRATE 115200 On the TFT screen, go to Settings > Machine Settings and set the baud rate to 115200 as well. If they mismatch, you get a blank screen.
Find #define MOTHERBOARD . For the Nano V1.3/V2.0, set: #define BOARD_MKS_ROBIN_NANO_V3 (This is backward compatible).