Just did some tests on the board, the transistors seem OK but possibly some a bit iffy, seem the get a slightly different reading each time I check them but could be just me not holding the probes steady enough.
The diodes are out of the specified range, test about .80 in one direction and .55 in another, all pretty much the same so not sure whats up there.
The U1 chip doesn't look too happy, pin 12 reads .484 and according to my specs should be .1 to .2, pin 13 reads 1.50 and should be .7 to .8
So looks like the chip, (or chips) are bad, no big deal really as the solonoid driver board kit I got comes with new U1, U2, U3 and U4 chips and new sockets.
However would be nice to get someone else to look at this to make sure I'm on the right track and there is no other underlying problem.
