What was found
DURING COCKPIT SETUP. ACFT POWER SURGED & POPPED OFF. ALL SCREENS WENT BLACK. POWER CAME BACK ON A FEW SECS LATER. POWER THEN DROPPED OFF AGAIN & CAME BACK. THERE WAS THEN A STRONG ODOR OF ELECTRICAL SMOKE IN COCKPIT. THERE WAS ALSO A POPPED INTERPHONE CIRCUIT BREAKER. RAN APU & BOTH ENGINES. PERFORMED GENERATOR DRIVE SYS OPS TEST, PEFORMED AC GENERATION AND BUSS CONTROL TEST, PERFORMED POWER & REGULATION OPS TEST. ALL TESTS PASSED. ALL GENERATORS POWERED APPRORIATE BUSSES DURING TESTS. AFTER ALL TESTS PERFORMED CHECKED CIRCUIT BREAKERS IN COCKPIT & MEC TO ENSURE NO NEW CIRCUIT BREAKERS HAD OPENED DURING APU & ENG RUNS. NO NEW CIRCUIT BREAKERS FOUND OPEN.