What was found
DURING TAXI, ELECTRONIC LIGHT ILLUMINATED, RAN QRH RETURN TO GATE. ACFT GROUNDED. PERFORMED FIM 24-31, TASK 801, ELECTRIC LT BITE CK. LOGGED STAT INV INOPERATIVE FAULT. PERFORMED FIM 24-34, TASK 801 & FAULT CLEARED, REF LOG 11411176 FOR ETOPS TOP DEFERRAL.