Zip archive of about 11.3 MB containing firmware V8.29 for the A9500 receiver, built 26 October 2021. Several related models received the same version, so check the archive is for A9500 before use. Unpack it to find the image, then flash via USB update or a programmer when the box will not boot. Confirm the board type matches and save a dump of the existing firmware, since a mismatched image can leave the receiver unresponsive.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @tvsoftwareworld. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip