As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON THE MCP - "LNAV" GREEN LIGHT WILL NOT ILLUMINATE WHEN PUSHING THE BUTTON. LNAV ON THE FMA DOES ILLUMINATE. GROUNDED - YES. REF AMM 22-11-34, REMOVED/REPLACED DFCS MCP. OPS NML REF AMM 22-11-00. LLM MAINT TEST FOR MCP LAND VERIFY AND REPLACEMENT TEST FOR MCP COMPLETED/GOOD. GROUND VERIFICATION TEST GOOD. THIS CLEARS MEL 22-15X.