That's rather vague. I can't offer much advice, but I can give you a bump so that those with knowledge may see your post. That said, they'll need a little more information I am sure. Where is this flashing? Are there codes appearing with it? Have you checked all the basics? Is there any reference to this under the troubleshooting section of the manual?
More knowledgeable members should be along; good luck! May it be an easy fix.