What was found
CYAN "AHRS BASIC" LOSS OF RT DATA. NR 2 N1/ITT/FUELFLOW/QTY/FUELTOTAL DASHED LINES & NR 2 DC VOLTS/AMPS & BATTERY VOLT/AMPS & BATTERY TEMP. AMBER RADAR ALT LIGHT. SWAPPED GEN I/O CARDS & RELOAD SOFTWARE. RT SIDE DID NOT COME UP, SHOWED DASHES ON ENG INDICATORS AND BATTERY. PUT CARDS BACK IN ORIGINAL POSITIONS, RELOADED SOFTWARE NOW HAD CARD IS IN MAU NR 3. POWERED ON SYS & VERIFIED FAILURE IS CURRENTLY ON LT SIDE SYS. REMOVED NR 3 AND NR 4 GENERIC I/O MODULES, RESTORED MODULES TO ORIGINAL POSITIONS. REMOVED NR 4 GENERIC I/O MODULE, INSTALLED MODIFIED MODULE IAW MM 34-17-00. LOADEDED MODULE SOFTWARE IAW MM 34-23-10. OPS CHECKED GOOD. EICAS DISPLAY AND MESSAGES VERIFIED NORMAL.