SamyGO

I think your problem is that, you are not update valid.txt file.
Take a look this page

Okey I thin this page will help you.

http://wiki.samygo.tv/index.php?title=S ... ecfile_.29

You can use SamyGO Firmware patcher in python manually to make your job.

You needed to enter python Script and import SamyGO Script.
After, SamyGO.calculate_crc( your_exe_image_path )

will generate CRC, put that string in to validinfo.txt after "exe.img_" as it shown bold at wiki page.

I think TV does not require NFS module because AFAIK kernel compiled with NFS support.
Telnet access is important thing to have. You can enable it via Telnetd application at download menu.

I am planning support A series by SamyGO Firmware Patcher. Needed time for it. There is also application at my mind thats for PVR function. (A sample video recorded on B650, might be your TV can do it too)
THanks.