purchasing the electrical board for a Potterton Lynx boiler purchased 1992?

My boiler HAX 003983 is not working. It just won't fire up it keeps trying. I have been advised to try and find out if I can purchase a new electrical board which is where the problem is. It seems as though some of the circuits have burnt out. I have tried soldering the disconnections but it only worked for short while. I am really worried as the winter is creeping up soon and I currently have not hot water or seen any signs of heat from the radiator. My boiler has a side flue due to lack of space, the flu is at the side. Any information would to help would be gratefully appreciated