Locate the physical or Reset button on the physical box or hold down the power button on your remote control.
| Problem | Possible Cause | Solution | | :--- | :--- | :--- | | Box does not recognise the USB drive | Drive formatted incorrectly | Reformat the drive to and copy the firmware file to the root folder again | | “No Match File” error appears | Customer ID mismatch or wrong firmware version | Check your current Customer ID in the “Version” menu (press 1502 or 1503 on the remote). Use a Customer ID replacement tool to modify the new firmware file, or download a version that matches your ID | | Upgrade stops at “Erasing Flash” | Corrupted firmware file or failing flash memory | Re‑download the firmware from a trusted source. Try a different USB drive. If the problem persists, use the RS232 method to recover the box | | Box shows a black screen (no boot) after upgrade | Incomplete flash or incorrect firmware | This is a “bricked” state. Use the RS232 cable and a loader to flash the correct firmware again | | Timer still does not work after upgrading | Hardware timer bug | Try a different firmware version (e.g., the one from 4331_032_135_1023_29 for your model) | Upgrade Firmware Sunplus Box Tv1 20-