[Hampshire] GuruPlug no longer boots.

At the last Southampton BaB I brought my Guruplug Server Plus but was
unable to connect as the Ethernet was not working. I have just find
time to try running it again I find it no longer boots. When plugged
into the mains only the power led lights up but none of the other 3
do. As far as I can see there is no way out of this without connecting
a JTAG board which I do not have and would be beyond my capabilities
anyway.

Any experts out there who could solve this for me?
--
Clive Woodfine