Brom Disabled By Efuse 0x146
Secure Boot Control (SBC) and Serial Link Authentication (SLA) are enabled. The device demands a cryptographic handshake (authorized service center login) before opening communication ports.
What (e.g., UnlockTool, Chimera, Pandora) are you currently using?
Since eFuses are permanent, replacing the logic board is often the only DIY fix. 💡 Pro-Tips
Using the wrong "Custom Preloader" can result in a "Hard Brick" where the device will not vibrate or turn on at all. Are you trying to fix a specific device? If you tell me the (e.g., Samsung, Vivo, Motorola) and the Model Name , I can find the specific Custom DA file Test Point diagram for your phone. eFuse IC for robust power supply protection brom disabled by efuse 0x146
: Ensure the device has at least 50% battery before attempting Preloader or Test Point flashing.
For brands like Xiaomi or Vivo, you might need a tool that supports "Server Auth." These tools communicate with the manufacturer's servers to get a digital "handshake" that allows flashing even if the BROM fuse is blown. 4. Updated Exploits
Instead of using generic MTK tools, use the proprietary flashing software designed for your specific brand. These tools are programmed to talk to the Preloader safely: Secure Boot Control (SBC) and Serial Link Authentication
The Brom disabled by Efuse[0x146] error is a permanent hardware lock that manufacturers use to enforce security and prevent unauthorised low‑level modifications. For repair technicians and enthusiasts, encountering this message means traditional BROM‑based servicing is impossible. Understanding the role of eFuses and the irreversible nature of these locks is critical for anyone working with modern MediaTek devices. As manufacturers continue to tighten security, we can expect more sophisticated lockouts—making research and caution more important than ever.
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Once eFuse 0x146 is active, the chip permanently disables standard BROM mode accessibility. The processor will refuse to open the BROM flashing port when you plug in a USB cable, effectively blocking third-party flashing utilities. Why Do Manufacturers Disable BROM? Since eFuses are permanent, replacing the logic board
There is a common misconception that you can "reset" this fuse. Once an efuse is blown, it is a permanent physical change to the processor. However, there are two ways to work around it: 1. Use "Preloader Mode" Instead of BROM
(e.g., Amazon Fire 7 2019) – If that connects fine, but your Dimensity device shows 0x146, you’re fused.
To eliminate unauthorized device modifications, bootloader unlocking, and third-party forensic extraction, manufacturers (such as Samsung, Xiaomi, and Oppo) ship over-the-air (OTA) updates or factory revisions that systematically blow this eFuse. This locks down the hardware interface permanently, ensuring that older BROM bypass exploits can never be executed on that chip again. 2. MDM and KG Lock Enforcement
What is the exact of the phone you are trying to service? Which specific software tool generated the 0x146 error?