The folks at Melos have started an upgrade/repair shop. Do a search and you will find it.
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Contact Melos Audio Restoration, linked through "Melos" here at Audiogon's manufacturer's listings. They are in Las Vegas, and can help you with very skilled repair of Melos equipment (this is from personal experience; they expertly repaired my Melos SHA Gold Ref. preamp after shipping damage.) Good luck.