I gave it all a good clean and the display is so much brighter and clearer now and is staying on. There is a bit of rust by the dispenser that I'll have to sort but not bad at all considering its age.
Here's the back of the board before I realised how to disconnect it while it is still in the facia duh!
If you FB message me, or email me to my GMail, with your chosen details, I'll happily set up the account for you, as I have plenty of spare time to do small jobs like that, as I do quite a lot of stuff on my laptop each day.