Me, again. Tried once more and it worked. Left it for several hours between attempts.
Pressed 7 with reset or ext link and 8 with reset and ext link. One of them worked but I'm not sure which one. Still, that's not many for you to try. I don't think I was being patient enough. When it did begin to work, the screen began blank, then added LEDs slowly, at first dimly, then brighter till the whole screen was filled with every possible symbol. This took a few moments, it wasn't a quick thing. Slowly, it settled back down to the flashing clock. I was able to use the remote - hurrah - and accessed the menu to set the clock and now everything is working perfectly. Amazing. I never knew that they could be unlocked. When I think of the jammed vcrs that I've chucked........
Topper, April 2010