Espace 2.2 DCI

Can someone please help me ! I have got a 54 reg espace 2.2 dci, gone to unlock it this morning and I had to use the emergency key ! put the card in the slot and everything is dead i.e I have no power to anything and nothing at all lights up. I have tested the battery and it shows 12.2 volts so I have currently took the battery off and got it on charge. Is there anything else I can check ?

Thanks Neil.