PSN keeps logging me out around 9:00 every night. It happens whether I'm watching a movie or playing a game. I've checked everywhere to see if there was some time limit set and there's not. There is not an error code displayed when this happens, a message just comes up that says there has been an error you are being signed out of the network. I am not able to sign back in until the next day. HELP
My guess would be that you are having issues with your Internet service provider. You may want to contact them, as I don't see any way that the PS3 could only malfunction between 9pm and 9am.