Oh dear, I think I have properly broken it now. When I first looked at the links provided, I tried the "hold all 3 buttons down" to get it into the "fastboot #1, #2, #3" mode and it worked. I didn't have time to look at the rest then, so I just turned it off. I left it on charge as I thought the battery must be low. Going back to it tonight, I have tried to get it back into that "fastboot #1, #2, #3" mode, and I can't. Pressing any combination of the buttons makes the black screen start to flicker on, then it goes off again. Have tried for a lot of times, and it is not getting anywhere.
Guessing I might have totally damaged the firmware now if there is not even any way to get into that "fastboot #1, #2, #3" mode...
Any ideas? Or is this really just destined for the bin!!??