If you’ve ever had to take apart the QL and disconnected the LED wires, you may well find yourself cursing how on earth they go back together if you didn’t remember to make a note before removing them.
Well, Cristian on QL Forum has come up with a neat little diagram showing which order the LEDs are re-inserted. I’ll reproduce the diagram here, but the original is available from my site at http://www.dilwyn.me.uk/docs/hardware/index.html (scroll down the page to the LEDs section).
Cristian also provided a wiring diagram for making a SER2 (UK connector) to DB9 adaptor lead. The diagram is available from the same page. Scroll down the page to “Sermouse – SER2 Adaptor”