I just recently (2 weeks or so ago) bought a CECH-2504A Playstation 3 Slim with 160GB. But it was only today that I tried to connect it to the Internet for the first time.
Generally, everything is working fine, but I frequently get short disconnects that manifest themselves in the message "Ethernet cable not connected". As a result, I get disconnected after 5 minutes or so whenever I try to play a game online (in this case, Demon's Souls).
I recognized that trying to download a demo from the store, for example, is a "guaranteed disconnect". Right at the start of the download.
Now bear in mind that my PC works flawlessly with the exact same network setup, it is stands right next to my PS3, I just took the cable from my PC and connected it to the PS3.
What I have tried so far:
- Used different ethernet cable
- Turned off router, then after 30 seconds turned it on again
- Completely restored my PS3 via the recovery menu
All to no avail whatsoever.
I could find several similar problems on the Internet, but none of them really helped.
Any help is much appreciated
Is your router's firmware upgraded?
Also, view the following thread, as it may assist you. http://community.us.playstation.com/thread/3891787