De Walt/ Black and Decker 7770/3427 Radial Arm Saw

Hi, 18 months ago I bought this machine from an older gentlemen who had it since he bought it new. I used it semi professional (every day in small workshop) but now I've got some troubles:(. The saw doesn't want to start up properly:?. I have to 'help' :no:it to start and it seems the brake isn't working any longer either. According to instruction manual it probably is the start relay but I need some prof. help to repair. Can anyone give me address or details of someone who might be able to fix this for me? Of course I'm willing to pay. I'm based in St Kilda.

Thanks