OK, I’m an idiot. I soldered the 32.768KHz crystal into X1 not X3. rectifying now and will cross fingers.
(Edit) doesn’t appear to have helped – could I have damaged anything by installing X3 into X1? The instructions state ‘Please DO NOT solder the 25MHz crystal onto X1 (that would caused the Ethernet controller to stop working).’
Does ‘stop working’ == kill the chip? Assuming it does, will any of these work? http://australia.rs-online.com/web/c/?searchTerm=ENC28J60&sra=oss&r=t
I think this one is correct? http://australia.rs-online.com/web/p/ethernet-controllers/6988981/