Here is the forum-style post for the firmware dump. Subject: [Download] Geant GN-HD90 Original Firmware Dump (ZIP) Hello everyone,
Use the official Geant Upgrade Tool to flash the bin file via a Null Modem cable. Download Dump Original Geant HD90 zip
Flash this at your own risk. Ensure your power supply is stable during the process to avoid permanent bricking. Here is the forum-style post for the firmware dump
If the box is dead (red light only), use a CH341A or similar SPI programmer to flash the 8MB chip directly. SPI Flasher programming
Recovery, SPI Flasher programming, or RS232 restoration. Download Link: [INSERT YOUR DOWNLOAD URL HERE] Installation Note: