0x146 [best]: Brom Disabled By Efuse

The only reliable solution. Newer replacement boards come with the eFuse already blown (same as original). You cannot downgrade.

For many devices with disabled BROM via software/fuse, shorting a "Test Point" on the motherboard to ground can sometimes force the processor into a state where it accepts a connection.

When you see this error, the device is essentially saying: "I refuse to enter the low-level BROM state because the hardware security fuse tells me it is forbidden." Why is this happening? brom disabled by efuse 0x146

When the BROM interface is permanently severed by the 0x146 eFuse, traditional servicing methodologies completely change. Feature / Capability Pre-eFuse 0x146 State Post-eFuse 0x146 State Fully functional; allows authentication bypass. Blocked ; USB connection drops or errors immediately. Preloader Mode Access Accessible for standard firmware flashing. Limited ; requires strictly signed vendor firmware. KG / MDM Bypass Achievable using generic MTK click tools. Blocked via standard low-level software tools. Dead-Boot Unbricking Easy to recover via low-level flashing.

Since the standard software bypass is physically disabled by the eFuse, you must use alternative communication ports. : The only reliable solution

To give you the exact "piece" (file or steps) needed, please tell me:

Manufacturers, specifically companies like Vivo and Oppo, deploy this hardware-level security to prevent unauthorized flashing, pattern lock removal, and device servicing through third-party tools like SP Flash Tool or CM2. 🛠️ Why This Error Occurs For many devices with disabled BROM via software/fuse,

Manufacturers implement this lock to patch hardware exploits (like the famous Kamiri or MTK Bypass exploits). By disabling BROM mode at the hardware level, they force the device to only accept boot instructions that pass through a secure, signed Preloader. This prevents unauthorized flashing, bootloader unlocking, and data extraction. Common Scenarios Where This Error Occurs

: Ensure the device has at least 50% battery before attempting Preloader or Test Point flashing.

using unofficial, unknown tools.