Hello again!
I tried to step into Second Stage Loader as described on the following two pages.
Flashing a new firmware by Browser
I get a network link and I get a static IP from my gateway. I also get a nice confirmation on the TV.
"Link: OK
Mode: 100 Full"
But when I go to the IP address in my web browser, it just keeps loading. I then get a reassuring "connection has timed out" message.
What's might be the problem? Static IP? I don't think this could cause this kind of problem, it should not matter if it's dynamic or static. Corrupted Second Stage Loader? Too old Loader? It's build "#84 (2011-09-01)".
I even tried to append "upgrade.dhtml" to the URL to no avail.