As MANY have found, the Samsung Blue Ray DVD player, BD-E5400 works for a week or two; then, it looses its WiFi connection to your wireless router and services, such as Neflix. I too tried various re-connect methods, but none worked until I used the WPS (PBC)-option method and the "restore factory settings" routine. My E5400 is now connected and Netflix works again.
What I had to do was replace my old 2005 wireless router with an new one that has a WPS button. The newer routers have this button on the back or side. I used this WPS button to auto-connect my E5400 to my new WiFi router.
The steps I used are as follows:
After I installed my new router, I confirmed I had WiFi-based Internet access by bringing up Google on my laptop.
I then turned on the TV and my E5400 DVD player to get the Main Menu screen.
Next, I did the factory-settings reset. The Samsung manual says to hold down the STOP button for 8 seconds. It's located in the circle on top of the played . .the square icon-button. The goal here is to get the black screen which re-starts the player setup routine. My first attempt failed; I held down the button for over a minute, but nothing happened, The fix was to unplug the DVD player for a few seconds, then restore power AND quickly hold down the STOP button. After about a minute, I the black setup screen appeared.
Now press the Enter button on your remote until you get to the screen that asks for the type of wireless connection. The two option buttons are "Wireless" and "WPS (PBC)". Scroll right and select the latter. . that is,"WPS (PBC)". After you press Enter to select it, you'll have 120 seconds to find and press the WPS button on your WiFi router. Do this. . . the network apps should now auto-connect your DVD player to your WiFi router.
Finally, be aware you'll have to go through sign-in again routine to services, such as Netflix.
NOTE: Earlier, I contacted my ISP service center and asked for assistance to fiix my connection problem. The Tech Rep advised me the connection to my cable modem was OK . . that their maintenance of my cable link falls under "Basic Service". I was also told a service tech could remotely fix my WiFi problem, BUT this support falls under "Premium Service" and would cost me $69 for the repair session. Did NOT like or do this. It smacks of being a consumer rip off, since an ISP service tech can do a remote fix in about 10 minutes or less. I also ran across this in New Mexico when I had a problem setting up my brother's WiFi network. His cable/ ISP rep cited assistance fees of $179 per year or $100 per session for WiFi assistance.