There is some specific info inside the file header which might prevent an OEM update if not matched to the model.
I You got an older firmware file of Your model, try to check / compare it with a hex editor.
I did the same already for a XE1 model.
Originally Posted by Electone
Oddly, when I put the update disc in my A3, it shows both "VERUP" on the front panel and asks if I want to update on the tv screen. But, when I put the disc in my SHD7000, it only shows "VERUP" on the front panel and the tv screen goes blank. I think I'll wait on this update for now...