Mainboard out of stock so had another go at this. As in the photo, it turns out the solder didn't stick thanks to oversized tip I was using. So shorted r1309 with a graphite pencil instead and it booted back to life.
Yes, it's a bodge which probably (definitely) won't last too long so going back in the drawer for now.
Yes, it's a bodge which probably (definitely) won't last too long so going back in the drawer for now.