Built-in hex editor used to unlock hidden Panasonic plasma TV features

As someone very familiar with the underlying software of current generation HDTVs I can tell you almost all of them have similar menus / editable hex interfaces allowing users to change things they probably oughtn't to change.

As someone else noted; Most all of the 'top end' LCD model are running custom Linux kernels under the hood.

Some shots of these "exciting new menus" would be nice. I'm always interested in free functionality hacks, but without any info as to what that functionality might be, the stakes are a just a little too high.

I recently had to decompile old software that can't be registered any more. It was in VB3, so I decompiled it with a tool I found, and then I figured out where the code is that deals with registration (searching [with a hex editor] for embedded strings in the decompiled VB3 code).

What's silly is: First, I only had to change 1 byte. The second is, I couldn't figure out how to change the branch instruction to the opposite, but I got lucky and hit upon it by accident (if I recall correctly, I changed the address [eg, variable 17 instead of 18] of the registered flag not the opcode).

Certainly hacker-ish, but the requirement of a specific brand of plasma TV severely limits its utility.

Blocked by my workplace (Springy plane designer: sounds like Boing) :(