After reading about heating problems on this forum (started by shaggs on 18th Nov 06), I have found that the solder joints for the black relay nearest to to wire terminals on the pcb, look as though they have been badly soldered or have partly melted (no other burn signs on pcd track). They look to me what I call dry joints – cracks in the solder.
Is this the relay that has been spoken about in previous answer?
Or is it the large blue one at the top of the board?