As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTS AUDIO SELECT PANEL NR1 MIC SWITCH INTERMITTENT. ALL ON LIGHTS IN MIKE SELECTOR SWITCHES INOP. BACKGROUND LIGHTING FOR PANEL IS ALSO INOP. REPLACED CAPTAIN'S AUDIO CONTROL PANEL IAW MM. PROBLEM RECURRED. REPLACED CAPTAIN'S AUDIO SELECTOR PANEL IAW MM. LIGHTING OPS CHECKS OK.