Hi, thank you for your replies. I have attached a few more pictures of the whole board and a picture of the diodes that I need, from a picture I found online. The treadmill is quite old and not worth spending ££s on it. I really appreciate your answers. I thought it would be a case of replacing the two blown diodes, one blown resistor and the two transistors and hoping for the best, but obviously there's more involved and I cannot find a schematics for the treadmill anywhere.
Regards, Kev