Unless there's an upgrade you can flash into it's firmware, you may be out of luck.
Seems to be a common complaint.
http://www.consumeraffairs.com/home_electronics/samsung_bluray.html
I have a BD-F5700 bluray player that has recently started acting up especially when Netflix is selected. When I go to the Netflix App, the screen goes black and after a while I get the screensaver. The player becomes unresponsive and I have to turn off the TV and the player. I reset they player and checked for firmware updates (says I'm current), the timezone is correct, and I am wired (not wireless) to the player.
Any help is appreciated.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic