What was found
SHORTLY AFTER T/O LOUD CLICKING SOUND COMING FROM MCP PANEL. RAPID CLICKING LASTED APPROX 2MIN. AUTO PILOT B & AUTO THROTTLE ON. ALL OTHER INDICATIONS NORMAL. TURNED OFF AUTO B & AUTO THROTTLE, LATER CLICKING RETURNED BUT MUCH SLOWER, LASTED COUPLE MINUTES. THEN RETURNED W/ RAPID CLICKING, NO SMOKE OR ELECTRICAL SMELL AT ANYTIME. GROUNDED - YES. DIVERSION TIME 29 MINUTES - REMOVED AND REPLACED MCP REF B737-800 AMM 22-11-34. OPS NORMAL. REF AMM 22-11-34. LLM TEST ACCOMPLISHED REF AMM 22-11-00. CHECKS GOOD. A/C REMAINS CAT IIIA, HGS QUALIFIED.