I recently bought a 40PFL9715K/02 (germany)
I tried to update the firmware via USB. The german support page shows the firmware update, 2011-07-15

I formated my USB stick with FAT32 and put the autorun.upg from the archive (40pfl9715k_02_fus_deu.zip)
to the root of the stick.

After i put the stick in the USB port the TV shows a stick access. The TV didn't start the update process. If i put an mp3 file on the stick the TV shows only an empty stick.

If i put a 40gig HD with mp3 and mkv to the TV i can access the file structure and play some files. But if i put the autorun.upg to the root of the HD also the update didn't start.

What am i doing wrong?