What was found
WHEN AVIONICS POWER WAS BROUGHT ON, ARCING SOUNDS WERE HEARD ALONG WITH THE ODOR OF BURNED ELECTRONICS. NO C/B POPPED. RMU 1 SCREEN FLICKERING RAPIDLY. REMOVED INSTRUMENTS AND CB PANEL. FOUND LINT & DEBRIS. CLEANED AS REQUIRED. REMOVED RMU, WILL SUPPLY EXCHANGE UNIT. INSPECTED INSTRUMENT PANEL ITEM. NO EVIDENCE OF ARCING OR SMOKE. INSTALLED CUSTOMER SUPPLIED RMU. OPS CHECK GOOD IAW MM 23-13-00. REINSTALLED REQUIRED CB PANEL AND INSTRUMENT PANEL IAW 24-50-02 OF THE MM.