What the BIOS password does
I hope this overview helps you understand the technical realities of resetting a Surface Pro 4 firmware password. Are you looking to specific hardware tools like the CH341A programmer to attempt this repair yourself? Share public link
This method requires technical expertise and can potentially damage your device. Proceed with caution.
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Tweaking the system time does not bypass modern UEFI security. surface pro 4 bios password reset high quality
Locate the 8-pin EEPROM chip. It is typically a or Macronix chip (e.g., W25Q128FV). 3. Read the Original Dump
: Continue holding Volume Down until you're prompted to select a language and keyboard layout. Select your preferences.
Improper reflashing can cause the touchscreen to stop working (showing as "ME" or "Microsoft Touch" errors in Device Manager) because the touch firmware is often stored within the same BIOS image. 4. Distinguishing BIOS vs. Windows Passwords
Press and hold the and the Volume Up Button simultaneously for at least 30 seconds. Do not let go when the Surface logo appears. What the BIOS password does I hope this
Technicians use a hardware programmer (like the CH341A) to read the chip's data, strip the password section from the hex code, and re-write the "clean" firmware back to the chip.
The fragile Surface Pro 4 screen must be heated and carefully unglued from the chassis.
: Because of its proximity to other components, a clip often won't fit, so the chip must be desoldered.
If you can still boot into Windows normally, access UEFI settings from within the OS as a last resort. This method might bypass a password if the device hasn't been fully shut down: Proceed with caution
An inexpensive hardware tool used to read and write firmware chips.
Microsoft will provide a file that you load onto a USB drive to clear the password. 2. Using the Hash Code (The Only "Soft" Reset)
Open your backup.bin file inside a hex editor or a dedicated Surface UEFI patcher tool.
This method is . It requires: