As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT CREW REPORTS #1 ENGINE WILL NOT START, START VALVE LIGHT ILLUMINATES WITH NO N1 OR N2 ROTATION. GROUNDED - YES. PERFORMED #1 ENG STARTER OVERRIDE, NO N1 NOR N2 ROTATION. SUSPECT BAD STARTER. REMOVED AND REPLACED #1 ENG STARTER PER B737-800 AMM 80-11-01. OPS CHECK GOOD PER AMM 71-00-00.