What was found
DURING FLT (RED) "LAV SMOKE" CAS MESSAGE POSTED ON EICAS ALONG WITH AUDIO WARNING "SMOKE". FEW SECONDS LATER MULTIPLE CAS MESSAGES POSTED ON EICAS & DCU ILLUMINATED. (CYAN) "IAPS FAN FAULT" (CYAN) "FLAP FAULT" (CYAN) "EQPT RACK FAN FAULT" (CYAN) "L ENGINE FAULT" (AMBER) " L STARTER FAIL". ACFT LOST ENTIRE LT SIDE INDICATION (PFD, MFD, FMS, AND RADIOS). YAW DAMPER DISENGAGED, CABIN ALTITUDE WARNING ILLUMINATED & CREW FELT MOMENTARY LOSS OF CABIN PRESSURIZATION. DESCENT TO 10,000" INITIATED & DURING DESCENT LT SIDE SYS BEGAN TO RE-APPEAR. LT SIDE FMS/GPS POSITION LOST & REVERTED TO DEAD RECKONING. CO-PILOT SIDE SYS REMAINED NORMAL THROUGHOUT. ACFT DIVERTED DIVERTED AND LANDED WITHOUT INCIDENT.