I experienced the same problem. I did not updated the firme ware because my F828 already came with latest version.
To view the firmeare information in your camera you must have the AC power adpater conected otherwise it wont show. This is all I know. From here I think you have only to follow the steps of SONY guide.
Sony F828 firmware update problem
in Mirrorless Digital Cameras
Posted
Hello!
I experienced the same problem. I did not updated the firme ware because my F828 already came with latest version.
To view the firmeare information in your camera you must have the AC power adpater conected otherwise it wont show. This is all I know. From here I think you have only to follow the steps of SONY guide.
Hope I could help in any way.
Regards
Luis Santos
PS - sorry any miss spelling