RetroCompass
RetroCompass

TrimUI Brick Hammer — Reset

Quick answer

Button combo

(hold VOL−)(hold VOL−)+POWER

Steps

  1. 1Back up your Saves, Roms and BIOS folders from the card first.
  2. 2Download the tg3040 Brick SD base package from TrimUI's GitHub.
  3. 3FAT32-format the microSD/TF card and extract the package to its root with 7-Zip.
  4. 4Re-insert the card, hold VOL− + POWER, and wait for the flash to finish.
  5. 5On CFW like Knulli, use its built-in factory-reset script instead of re-flashing.
Last verified: 2026-06-20Source: github.com

Because the Brick Hammer is the same TG3040 platform as the Brick, resetting works identically: it keeps system and games on the microSD card, so a clean reset means re-writing the card with TrimUI's SD base package and re-flashing the on-board firmware. Extract the base package with 7-Zip (other tools may corrupt it). There is no in-menu factory reset on stock OS; custom firmware such as Knulli ships its own factory-reset script, and a factory reset clears stored Wi-Fi passwords.

FAQ

Will a reset delete my save files?
Re-writing the card replaces everything on it. Copy the Saves (and Roms/BIOS) folders to your PC before you start so you can restore them afterward.
Is there an in-menu factory reset on stock OS?
No. Stock TrimUI OS is reset by re-flashing the SD base package. CFW like Knulli adds a dedicated factory-reset script in its tools.

Same device — other tasks

Other devices — same task