SamyGO

PS51D550 (T-MST4DEUC) downgrade successful, but no further upgrade possible... yes, then you downgraded from non restricted firmware (released by samsung before december 2011). those firmwares don't correct the "faked" versions number. ps: you forgot to write here your firmware version (1...

PS51D550 (T-MST4DEUC) downgrade successful, but no further upgrade possible, use this instead viewtopic.php?f=22&t=4238

Thank you wapper for this 0000 firmware. Saved my day!

Well, I took the plunge and was stucked with 1023. But thanks to the 0000 firmware provided by "wapper" in the firmware section, I was able to install 1024.

I have a european D550-Plasma, which has no smarthub and want to downgrade to T-MST4DEUC 1024 because since 1025 the picture was dimmed noticeably. Samygo-server provides 1023, which has the bug, that digital noise filter is always on http://www.hdtvtest.co.uk/news/samsung-ps51d550-201109221412.htm ...