As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - F/O'S OFSET LIGHT ON HIS MCDU TESTS GOOD BUT DOES NOT COME ON WHEN ON AN OFF SET. CAPT'S SIDE WORKS GOOD. NO CORELATING FMC MSG'S NOTED. PERFORMED FMC BITE CHECK IAW FIM 34-61-00 FIG 111. SYS CHECKED OK. MX CONTROL ADVISED OK FOR SERVICE AT THIS TIME.