If I remember correctly you're only option is to replace it with a MC350 or MC350A. The easiest is to repair the MC350. Where are you located and I maybe able to refer you to someone. We are in Texas and there are two service companys that repair these type of systems locally. They may have the ability to repair your system or sell you a refurb. There is also a company in Las Vegas and Ohio that maybe able to help and have a replacement system. Just let me know the direction you would like to go and I would be happy to help. Thank You Robert Pinell IntraSonic Technology, Inc. www.intrasonictechnology.com