How can i fix my problem; Fiat Marea Weekend 2.4 HLX 130 JTD?

I have a fiat marea weekend 2.4 HLX 130 JTD T reg 1999.
When i try to start the car there is nothing on the ignition the interia lights and the clock are both working but no lights on the dashboard. I've check all the fuses both in the car and under the bonnet and all seem to be fine. I have also checked the battery terminals and even put battery on charge for just over an hour but still no joy. Hope you can give me some idea as to what the problem may be. Thanks Jim