180 Chapter 4
Troubleshooting
No Display troubleshooting
No Display troubleshooting
If the E5071C displays nothing despite it is powered from proper ac power line, isolate the
failure in accordance with the procedure shown in
Figure 4-3.
Connect the keyboard to the E5071C rear panel USB connector, turn the power on and start
trouble isolation. The methods of trouble isolation are described in the procedural step 1 to
5.
Figure 4-3 No display trouble isolation procedure
e5071cse1119
No Display Trouble
Isolation start
No
Check rear panel fan and
dc monitor LEDs on PCA PCI DSP Card
Replace CPU Mother Board ASSY
PCA DIGITAL Bridge or PCA PCI DSP Card
Connect external monitor
Replace power supply
Check flat cable between PCA Front
Key and LCD DIGITAL Bridge
Check LCD backlight
Displayed
on monitor?
Flat cable OK?
Fan ok
and LEDs light?
No
No
No
LCD backlight ok?
Replace LCD_T PANEL ASSY
Replace Inverter Unit Assembly
Replace flat cable
Yes
Yes
Yes
Replace Analog Base Module
Check system fans inside
System fans ok?
No
Yes
1
2
5
4
3
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