GE Transport Pro, Service Manual

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6-4 Transport Pro Revision A
2012659-042
Troubleshooting: Problems
2. If the control panel lights are on, press the power button to make
sure monitor is not in standby mode. If display is still blank, cycle
monitor power and check the main processor status LEDs.
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If the red and yellow LEDs are on, check the main processor
cable connections.
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If the LEDs are off, replace the main processor FRU.
3. If main processor connections are good and backlight is on, replace
the main processor FRU. If backlight is off, measure the voltage
between J11 pin 1 or 2 and J11 pin 3 or 4 on the main processor
board.
4. If voltage is not b9 and +18 V, replace the main processor
FRU. If within range, check the voltage between J11 pin 5 and J11
pin 3 or 4 on main processor board.
5. If voltage is not b4.5 and +5.5 V, replace the main processor
FRU. If within range, replace the inverter FRU.
Display Dim
1. Clean the display.
2. Adjust the brightness.
3. Check the voltage between J11 pin 6 (+) and J11 pin 3 (–) on the
main processor with brightness set to 100 percent.
4. If voltage is greater than 2.3 V, replace the inverter board. If this
does not remedy the problem, replace the display FRU. If voltage is
less than 2.3V, replace the main processor FRU.
Display Flickering
1. Check the inverter to display and inverter to main processor
connections.
2. If connections are ok, check the inverter board cables for damage.
3. If the cable from the main processor board to inverter is damaged,
replace the inverter FRU.
4. If the cable from the display to inverter is damaged, replace the
display FRU.
5. If no cables are damaged, replace the inverter FRU.
Display Bad Quality
1. Perform video test in the Boot Loader program.
2. If any of the video screens look bad, replace the display FRU. If all
video screens look good, this is a customer preference issue.