I'd have to look at the paperwork that was returned with my camera (which is at home ... and I'm at work right now). But the estimate that they e-mailed to me back in April did not mention anything about a warranty on the repairs. Plus, since it's two different errors, I'm wondering if they'll say it's not covered? (If there is a warranty)
They do provide a limited warranty on repairs, either 60 or 90 days. Even though its a different error message, it might require the same part (motherboard), for example.
I'd contact them ASAP, but the 60 or 90 days is likely passed.
Error 70 is sometimes a bad memory card, so don't overlook that. It also might be a bent pin in the camera body. I've had a 33% success rate at straighting the bent pins, but be sure to check by looking in the camera with a magnifying glass. Usually, bent pins result in a no memory installed error, but error 70 is possible.
You can sell it for parts on ebay and at least get something out of it. The battery and charger can be sold separately if they do not work on your new camera.
I saw one that sold on ebay for $250 with error 70, so its not worthless.