As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, NOTICED THE GREEN DESELECT LIGHT ON THE N1 SWITCH - LOCATED ON THE MCP - WOULD INTERMITTENTLY FLASH ON AND OFF. APPEARS VERY DIM WHEN ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED DFCS MODE CONTROL PANEL. REF B737-900 AMM 22-11-34-000-801 AND TEST REF AMM 22-11-34-740-801.