how can i fix my Nissan Almera Tino 53 reg?

I have a Nissan Almera Tino 53 reg. Secure on a green background is on my dash computer radio stops working doesn't come up on dash all other electrics work, runs fine, then fails to start then starts then eventually after a few weeks won't start at all. Have had new immobiliser and battery fitted. This is the third time Same symptoms. Immobiliser light flashes on the dash. There is a clicking coming from under the dash seems to be in the middle when sometimes it turns over a bit then stops.PLEASE CAN ANYONE HELP.Thank you