I changed from WiFi to cabled Ethernet; since I changed, I have no problems at all. With WiFi I had a lot of problems, like described above.
I also stopped using the NP3900's Wi-Fi interface --- because the place where I want to use the NP3900 happens to have poor Wi-Fi reception. Now the NP3900 is connected to the LAN by means of cables and a pair of HomePlug AV powerline Ethernet adapters. This is a solution I would recommend to others in similar situations.
I chose exactly the same solution, powerline Ethernet adapters.
It is very sad, that the NP3900 seems to be a great device (other than some of it´s predecessors), but Philips messed up the WLAN implementation.
"Messed up" seems a bit strong. Its Wi-Fi reception is not outstanding and the NP3900 seems not to like some brands of access point, but within 15 meters of my Linksys WRT54G access point my NP3900 works equally well with Wi-Fi and cable Ethernet connections.
I wonder if we will start seeing built-in HomePlug AV in household electronic gear. It has advantages in comparison with Wi-Fi: easier to setup, more reliable, faster, less RF-polluting, better range in some cases.
The NP3900 is no cheap product. WiFi is no new technology. I do not own any other product, which has WiFi problems which are comparable with the NP3900.
Originally Posted by jdthood
Therefore from my point of view, Philips messed up with WiFi! Perhaps a later Firmware update brings corrections, but at this point Philips does not acknowledge any of the problems mentioned by me or other customers.