I can't verify if all models have a firmware update availability. It may be in that certain regions, firmware updates are not necessary, or not available. Unfortunately, I can't assist, but you may want to inquire with the Samsung customer service center in your region for further assistance.
I've just purchased my new LA46A650A1R SAMSUNG LCD, when testing at home I discovered that this model doesn't handel firmware upgrading throug the user menu. Ientered the service mode (PWR Off - Info - Menu - Mute - PWR On) and found tha the USB update can be done by the Advanced service menu.
My problem is that I can't find on the official Samsung WEB Site any firmware version available for this model. the current version installed in my LCD is :
Sep. 10 - 2008 12:43:15
1/ Is it the last version for this model?
2/ Where can I find firmware for this model?
3/ Does firmware version 1013.0 of the LA46A650A1M (available on Samsung site) work with this model (LA46A650A1R)?