Screen Is Not Shown (While Sounds Come Out of an Audio Speaker, Did Not Do of a Head Phone)

CHECK POWER SUPPLY CIRCUIT
1. Check voltage between DVD player harness connector B19 terminals 31, 32 and ground.
  31, 32 - Ground : Battery voltage
  
  Fig 1: Identifying Voltage Between DVD Player Harness Connector B19 Terminals 31, 32 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Turn ignition switch ACC.
3. Check voltage between DVD player harness connector B19 terminal 21 and ground.
  
  Fig 2: Identifying Voltage Between DVD Player Harness Connector B19 Terminal 21 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  21 - Ground : Approx. 5 V
OK or NG

OK : GO TO 2.

NG : Replace DVD player.
CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect DVD display connector.
3. Check continuity between DVD player harness connector B19 terminals 21, 31, 32 and DVD display harness connector B61 terminals 5, 15, 16.
  
  Fig 3: Identifying Continuity Between DVD Player Connector Terminals 21, 31, 32 And DVD Display Connector Terminals 5, 15, 16
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  21 - 5 : Continuity should exist.
  
  31 - 15 : Continuity should exist.
  
  32 - 16 : Continuity should exist.
4. Check continuity between DVD player harness connector B19 terminals 21, 31, 32 and ground.
  21, 31, 32 - Ground : Continuity should not exist.
5. Check continuity between DVD player harness connector B19 terminals 19, 27 and DVD display harness connector B61 terminals 6, 10, 12.
  19 - 6 : Continuity should exist.
  
  27 - 10, 12 : Continuity should exist.
6. Check continuity between DVD player harness connector B19 terminals 19, 27 and ground.
  
  Fig 4: Identifying Continuity Between DVD Player Harness Connector B19 Terminals 19, 27 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  19, 27 - Ground : Continuity should not exist.
OK or NG

OK : Replace DVD display.

NG : Repair harness or connector.