: If possible, back up your current channel list and system settings to the USB drive before upgrading.
: Ensure this specific "1507G" file matches your hardware version exactly to avoid permanent damage. Download GOLDRAY GR500 1507G bin
: Confirm the update. Do not turn off the power during this process, as it can "brick" the device (rendering it unusable). : If possible, back up your current channel
: Plug the USB drive into the receiver's USB port. : If possible