My local camera mechanic wont touch them as parts are an issue, especially the electrics. He will do RB's though.
Be a mechanical problem, you could get a quote, mightn't be too hard.
Probably best to send it back. I find you get better value from the Japanese market, unfortunately postage is an issue at the moment. I had issues with my first body I bought local and just bought a better one from Japan.The price has gone up since I bought my kit.
If you can take some photos and post up I could see if anything is amiss.