Matrix E 7 X - 0 3, Service Manual

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CHAPTER 8: TROUBLESHOOTING
NO DISPLAY ON THE CONSOLE OR THE DISPLAY IS DIM WHEN RUNNING
8.4 TROUBLESHOOTING - DISPLAY ISSUES
POSSIBLE CAUSES:
1) The switch on the console is in the wrong position.
2) The console cable is damaged or unplugged.
3) The UCB, LCB, or console cable is damaged.
SOLUTION:
1) Check to see if the LEDs are lit on the LCB (see Section 8.3). Troubleshoot using the LED indicators.
2) Check to see if LED D18 is lit on the UCB.
a. If LED D18 is lit, check the switch on the back of the UCB. It should be pointed towards the right side - LCB_Power (Figure A).
b. If LED D18 is lit, and the switch is in the correct position, but there is still no power, replace the console.
3) If LED D18 is not lit:
a. Check the console cable connection at the UCB and LCB.
b. Replace the console cable and LCB as needed.
FIGURE A