I have two Sony blu-ray players, and the "network connection status security" setting is " WPA/WPA2-PSK" and does not appear to be changeable. But, since the blu-ray player worked for years before it didn't, and a replacement player also didn't work, and apparently, the OP didn't replace the router, I think the issue is with the wifi network, not the player. The Sony support instruction in Post No. 2 is their recommendation to fix the issue that other customers have also had.
But, the fact is that Sony blu-ray players are primarily designed to play discs. Their usefulness as a streaming device is not comparable to modern streaming devices because they don't allow you to add or update any streaming apps you are using. So, if you are using an app that requires a software update, you can't do it. Not good.
|