Hmmm, looks like I've screwed up the custom firmware option. I first made a dump of the original stock FW. I flashed the custom FW, and all was great. Hakchi 2.20 had a green circle bottom left of it's window. I set the FTP, and FTP's into the SNES mini. I set the FTP settings to 1 download at a time, and began to back up the contents of the file system. After doing one folder, my FTP client started to report connection aborted, 500 Snes Mini not found. Looked that Hakchi 2.20, and the bottom left green circle had turned red.
Now, whilst in custom FW mode, the SNES Mini, doesn't appear to boot. When I power it down, the red power light flashes approx every 13s. I need to disconnect the USB.
I can flash back the stock FW, and then it boots as normal on the TV. I can flash back the custom FW, but then I'm back to the same problem again :/
Anyone any ideas?