The error message "BROM disabled by efuse 0x146" typically occurs on Samsung devices with MediaTek (MTK) processors when a security mechanism, often related to Knox Guard (KG Lock), has permanently blown a hardware fuse to prevent low-level flashing via Boot ROM (BROM) mode.
: This is often the most reliable "best" fix. You must open the device and short a specific point (CLK or CMD) on the motherboard to ground while connecting the USB cable. This bypasses the software-level BROM block and forces the device into a usable state for tools like ChimeraTool Preloader Mode (Software)
This specific hex code means the BROM entry has been permanently "closed" by the hardware efuse. Common Causes: brom disabled by efuse 0x146 best
: Widely considered the most frequent updater for bypassing "New Security" on MediaTek. Pandora Box
Knowing the model can help pinpoint the exact test point locations or required DA files. The error message "BROM disabled by efuse 0x146"
Method: This involves opening the device and briefly grounding the CLK (Clock) pin of the eMMC/UFS memory chip to the shield or ground while connecting the USB cable.
The 0x146 efuse is a hardware-level security lock. The best and most reliable solution is almost always the Test Point method. It physically overrides the security check, giving you full access to the chip for flashing, unlocking, or repair. Never blow security fuses until all boot flows
Recommended action: Verify that the main bootloader is intact. If boot failures occur, the device may require JTAG or hardware-level recovery, depending on the platform.
