The more you look at the board the worse it gets. There are a bunch of 'dry' joins on it. Top image on the close up photo you can see 2 joins in roughly a straight line below that moon made of silver holding a capacitor on. That join closest to the west of them is suspect too. There didn't seem to be a great deal of care taken when they were being assembled but the choice of capacitors is the one issue that has come back to haunt owners...