NO LIGHT
| CAUSE | SOLUTION | VIDEO TUTORIAL |
| 1 | NO SELECTION | CHECK OR REPLACE THE COMAND CONTROL PANEL MEMBRANE (BEEP SOUND) |  |
| 2 | NO SIGNAL | CHECK THE VOLTAGE 0-17 ON THE CONNECTOR ON THE SBBS BOARD | |
| 3 | NO POWER SUPPLY | CHECK OR REPLACE FUSES CLOSE TO THE TRANSFORMER | |
| 4 | POWER SUPPLY CABLE INTERRUPED | CHECK THE CONTUINITY OF THE CABLE OR REPLACE IT | NO NEED |