If I recall correctly the CDR 220 has a removable faceplate. The electrical contacts can become dirty. I suggest that you remove the faceplate and clean the contacts. I believe that some people have found success with a pencil eraser.
It is also possible that the head unit or the amp is damaged.
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2000 Arctic Silver/Black, Hard Top, On Board Computer
PNP Rear Speakers, HAES 6-Channel Amp, Avic Z140BH,
Painted Bumperettes, 2004 (OEM) Top, Homelink integrated in dash with Targa switch, 997 Shifter, Carrera Gauge Cluster with silver gauge faces, heated 12-way driver & 8-way passenger seats, Litronics, silver console
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