What was found
FT # 2338, BUR-BOS. DIVERTED TO LGB. AFTER T/O WE GOT A NAV LS DISAGREE ECAM. SHORTLY AFTER THAT RECEIVED AUT FLT AUTO PILOT OFF AND AUTO FLT A/THRST OFF. LOST BOTH AUTOPILOTS AND ALL NAV INFO. PER MX CONTROL, RECYCLED CB B2 AND M17. DID NOT RESOLVE PROBLEM. FLEW MANUALLY REST OF FLIGHT; CHECK MMR 1 & 2 & EMGC 1 & 2 BITE CHECK. OPS NORMAL PERFORM APS TEST CHECK NORMAL PER TSM 22-83-00-810-808-A. PRECAUTIONARY R & R FMGC-2. BITE TEST GOOD. OK TO CONTINUE INS SVC. UPON ARRIVAL FOUND NAV RAV SWITCH ON THE ON POSITION.