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Zune is now considered a legacy device and no longer supported.
From a search of older Microsoft forums this error is a hardware error and the Zune needs a hardware repair.
As Microsoft no longer support this product any repairs would need to be completed by a third party company. I have googled Zune repair options and this one appears to have a diagnostic and pickup service, you should contact them to find out how much a repair would cost, and then decide wether updating your hardware to a new product or going for the repair, it would be up to you.