Remove SD card before normal boot.
This happens if you flash firmware meant for a different screen hardware revision. You will need to locate the legacy firmware file or an alternative revision patch and re-flash the device using the blind bootloader method (Step 3).
Wait for the update to complete without interrupting power. The device may reboot several times.
Early firmware often freezes when switching between complex wave types (like sine to square wave) at high frequencies. fnirsi-1014d firmware update
Connect the oscilloscope to your PC via a USB "A to A" cable.
Press and hold down a specific button combination on the scope interface to force it into bootloader/update mode. (Note: For most 1014D revisions, hold down the or "OK" button while simultaneously plugging in the USB cable and pressing the Power switch).
I can guide you to the correct version and help you prevent bricking your device. Share public link Remove SD card before normal boot
Look at the Update Tool interface on your PC. The connection status indicator should turn from Red to , indicating the device is detected.
Conclusion Firmware updates for the FNIRSI-1014D can meaningfully improve the instrument’s functionality, reliability, and user experience. They should be approached deliberately: obtain firmware from trusted sources, prepare backups and stable power, confirm hardware compatibility, and follow the update procedure carefully. Understand and accept the small risk of bricking or losing calibration, and keep recovery options in mind (bootloader reflash, serial tools, or hardware programmers). When done correctly, updating firmware is a practical way to extend the usefulness of the FNIRSI-1014D and keep it aligned with evolving needs and fixes.
Note down the hardware revision and current firmware version string. Step 2: Download the Official Firmware and Flashing Tool Wait for the update to complete without interrupting power
Use a reliable USB-A to USB-B (or USB-C, depending on your hardware revision) cable. Avoid loose ports to prevent disconnection mid-flash.
Download the official firmware binary ( .bin ) directly from the FNIRSI website or their official Google Drive repository.
FNIRSI eventually released an official firmware update (Version 1.11 and later versions) that addressed many of the stability issues the community had complained about.