If all voltages are perfect, the firmware on the Flash IC is likely corrupted. You will need a hardware programmer (like the RT809F or CH341A) to flash the correct binary file matching your specific panel resolution. Sound Present, But Screen is Black (No Backlight)
Connection paths from ports to the processor inputs. 3. Flash Memory and Firmware (BIOS/SPI Flash)
Governs the timing of a dedicated boost MOSFET and inductor.