What was found
MAIN CARGO DOOR EICAS MESSAGE AND CARGO DOORS LIGHT ILLUMINATED AT CRUISE FL350 TIME 0051Z. ALSO HAD RISING CABIN PRESSURE. RAN QRH AND DESCENDED TO 10,000 FEET PER QRH. AFTER LEVELING AT 10,000 FEET, EICAS MESSAGE AND CARGO DOORS LIGHT EXTINGUISHED AFTER APPROXIMATELY 2 MINUTES. DIVERT TO KIND UNEVENTFUL. DECLARED EMERGENCY. EMERGENCY DECLARED VERBAL DEBRIEF FROM CREW: AT FL 35,000 CABIN ALTITUDE SET TO 4,500FT AND IT ROSE TO 9,500FT. CABIN PRESSURIZATION AUTO 1 WAS IN USE DURING THIS. VISUALLY VERIFIED ALL DOOR LATCH CAMS LOCKED IN THE CLOSED POSITION. PROCEEDED TO MOVE THE UNLOCK SWITCH TO THE MAIN CARGO DOOR LATCH CAMS AND THE SWITCH WAS UNRESPONSIVE. THEN PROCEEDED TO ACTUATE THE SWITCH TO THE LOCKED POSITION AND AUDIBLY HEARD THE MAIN CARGO DOOR MOTOR ACTUATE FOR 1 SECOND. PROCEEDED TO THEN MOVE THE SWITCH TO THE UNLOCK POSITION AND THE MAIN CARGO DOOR OPERATED NORMALLY. VISUALLY INSPECTED MAIN CARGO DOOR LATCH CAMS, LATCHES AND SENSORS. NO DEFECTS NOTED. TROUBLESHOT PER B767 FIM 52-90-20-00 AND AMM 52-71-09-2 STEP 8 & 9. OPS CHECKED MULTIPLE TIMES, OPS CHECK GOOD. A/C OKAY FOR SERVICE.