Brom Disabled By Efuse 0x146 🎯
: Shorting the wrong pins on the motherboard during a "Test Point" procedure can permanently kill the device.
Programming eFuse 0x146 to disable BROM is a powerful security measure that prevents low-level access and enforces secure boot, but it is generally irreversible and eliminates common recovery channels. Engineers should treat its programming as a late-stage, controlled action and maintain documented, vendor-approved recovery and repair processes to avoid bricking devices in the field.
In SP Flash Tool, ensure you have the correct preloader.bin for your exact model. 2. Test Point (Hardware Shorting)
Using official service tools (like MiFlash for Xiaomi or Odin for Samsung) with an authorized technician account can sometimes still write to the device. brom disabled by efuse 0x146
Historically, MediaTek chips suffered from severe BROM-level vulnerabilities (such as the infamous kamakiri exploit). These flaws allowed anyone with a USB cable to completely bypass security, dump data, and unlock bootloaders without the vendor's permission.
: Ensure your service platforms (such as UnlockTool or specialized MTK modules) are updated to their latest editions, as developers regularly introduce updated connection protocols for new security patches.
Because an eFuse is a physical change to the chip, you cannot "un-blow" the fuse or reprogram it back to its original state. However, you can change your repair strategy to work around it. Here are the proven methods to bypass this restriction: 1. Use Preloader Mode Instead of BROM Mode : Shorting the wrong pins on the motherboard
: It initializes basic hardware, verifies the primary bootloader, and establishes a secure environment.
To help pinpoint the right solution for your device, what is the of the phone you are working on, and which service tool are you currently using?
Replace SoC or mainboard
If you are in this state, your primary option is official service or finding authorized signed firmware for your device.
Since the EFuse is part of the processor (CPU), the only way to truly "fix" a 0x146 EFuse error is by replacing the main CPU itself, or replacing the entire motherboard. Conclusion
If the device is soft-bricked and the Preloader loop is corrupted, you cannot boot into standard Preloader mode. Technicians must resort to a physical hardware . In SP Flash Tool, ensure you have the correct preloader
Are you trying to or flash a custom ROM on this device?
