However, a frustrating error message has become increasingly common among technicians and power users: .

Rarely, eFuse only affects USB BROM, not JTAG. But on modern MTK, both are fused.

If the Preloader file matches your device secure configuration, the flashing process will start. Method 2: Utilize the Test Point Method (Hardware Force)

Use a pair of metal tweezers to short-circuit the Test Point to the shield of the motherboard.

The low-level USB interface is physically disabled by hardware eFuses, preventing software tools from force-booting the device into an unprotected state.

An eFuse (electronic fuse) is a microscopic fuse built into the system-on-chip (SoC). Manufacturers can permanently "blow" or burn these fuses during production or via software updates to alter the chip's hardware configuration permanently. Once an eFuse is blown, it cannot be undone. 3. The Meaning of "0x146"

: If your phone is completely bricked, BROM mode is usually the only way to force-flash stock firmware and revive the hardware. Understanding eFuse and the 0x146 Code

If you are seeing , your device's Boot ROM (BROM) has been permanently disabled via eFuse. This is a hardware-level security measure often used by manufacturers (like Xiaomi or Samsung) to prevent low-level flashing and unauthorized firmware changes. 🧱 What this means

If you attempt to bridge the traditional hardware test points () to force a connection, the device will still reject the connection because the CPU register reads the burned eFuse status and drops the standard BROM interface immediately. 4. How to Handle "BROM Disabled" Errors

Use modern tools that support "V6" or "Auto" authentication for modern security patches. :

If the software methods fail to communicate through the Preloader, you will need to bypass the security entirely at the hardware level.

Disassemble the smartphone to access the printed circuit board (PCB).

(electronic fuses) are one-time programmable (OTP) memory cells embedded inside the SoC. Unlike flash memory, once an eFuse is "blown" (set from 0 to 1), it cannot be reversed. Manufacturers use eFuses to:

When you see brom disabled by efuse , it means a specific eFuse bit has been programmed to tell the BROM: "Do not enter download mode under any circumstances."

The term refers to "electronic fuses" within the CPU—one-time programmable (OTP) bits that, once "blown" or set to a specific value, cannot be reversed. When a device shows the 0x146 value, it indicates that the manufacturer has triggered a security fuse to disable external access to this BROM interface. Why Manufacturers Use 0x146

The error message is a critical security status encountered on MediaTek (MTK) devices, signifying that the low-level Boot ROM (BROM) mode has been intentionally and permanently locked by the processor's hardware . The Mechanism: eFUSE and BROM

This forces the chipset into an emergency download state, circumventing the standard BROM boot check.