As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCP HEADING WINDOW UNREADABLE. GROUNDED - YES. REMOVED AND REPLACED DFCS MODE CONTROL PANEL REF B737-800 AMM 22-11-34/401. ACCOMPLISHED MCP INSTALLATION TEST AND THE LLM MAINTENANCE TEST FOR MCP REF AMM 22-11-34-740-801 AND AMM 22-11-34-400-801 STEP F.