An ounce of prevention:
Connect to device UART (TX/RX) to see preloader/debug messages: sp flash tool error status ext ram exception link
Completely uninstall your current version. Download an older or newer build from a trusted source (e.g., MTKDeveloper). Test three distinct versions. An ounce of prevention: Connect to device UART
in Windows 10/11 (via Advanced Startup settings). Uninstall any existing MTK drivers from the Device Manager. Reinstall the Auto-installer MediaTek VCOM drivers . sp flash tool error status ext ram exception link