Redmi 9C (MediaTek Helio G35) User action: Tried to flash a patched boot image via SP Flash Tool after a 2021 OTA update. Result: BROM: Disabled by eFuse 0x146 Outcome: Phone dead. No free fix. Motherboard replacement cost: $40. JTAG repair cost: $80.
The keyword asks for the fix. In the world of hardware security, "best" depends on your goal: Data recovery? Unbrick? Full repairability? brom disabled by efuse 0x146 best
: The 0x146 value indicates that the BROM (Boot ROM) is physically disabled by an electronic fuse (efuse). This means standard MTK flashing tools (like SP Flash Tool) cannot communicate with the device in its base state. Redmi 9C (MediaTek Helio G35) User action: Tried
In tools like SP Flash Tool (v6.x) or MTK Client, ensure you have the correct and Auth File for your specific model. These files provide the "key" to talk to the device through the Preloader port rather than the locked BROM port. 4. LibUSB Filter Re-installation Motherboard replacement cost: $40
| Device | Chipset | Typical Error Trigger | | :--- | :--- | :--- | | Xiaomi Redmi Note 10 5G | MT6833 (Dimensity 700) | Trying to write preloader without auth | | Realme 8i / Narzo 50 | MT6785 (Helio G96) | Bootloader locked and corrupted system | | Oppo A54 5G | MT6833 | Flashing via SP Flash Tool with generic DA | | Tecno Spark 8 Pro | MT6769 | BROM download without valid authentication file | | Infinix Note 12 | MT6789 | Miracle Box error "BROM DISABLED BY EFUSE" |
Demystifying MediaTek's Security: Understanding "BROM Disabled by eFuse 0x146"
This involves opening the phone and temporarily grounding a specific point (often the or CMD pin) on the motherboard while connecting it to a computer.