T-GASMDEUC 1009 Downgrade needed

[lativ]

Hi Lads,
My LT27A950 was upgraded from ver 1005 to 1009,
and SamyGo feautures stop working .

Can you explain me how modify 1009 fw file to rollback firmware,
for 1005 version? If there is some posibility to reflash 1009 but
change some file and then TV will accept old version?

Or mybe someone have T-GASMDEUC with modification.

Thanks .

[SupportDenmark]

NOT Possible