Once device shows MediaTek PreLoader USB VCOM (stays longer than 5 sec):
If preloader is not completely destroyed, you can enter BROM mode (BootROM) which cannot be killed by bad preloader. mtk preloader repair tool fixed
| Error Code | Description |
|------------|-------------|
| S_BROM_CMD_STARTCMD_FAIL | Preloader missing or incorrect |
| S_BROM_DOWNLOAD_DA_FAIL | DA (Download Agent) mismatch / preloader issue |
| S_SECURITY_CFG_INCORRECT_IMAGE | Security check fails |
| S_BROM_CMD_JUMP_DA_FAIL | Preloader didn’t handshake properly | Once device shows MediaTek PreLoader USB VCOM (stays
These errors mean the preloader is either corrupted, from a different firmware version, or completely absent. If preloader is not completely destroyed , you
