Agilent Technologies 54830 Series Service Manual page 94

No Display Trouble
Isolation
A
Remove cabinet and
install fan guard
B
Check fan
connections and
power-on
Fans running?
Power LED lit?
Yes
C
Connect external
monitor, cycle power,
and check power up
sequence
Power-up
displayed on ext.
monitor
No
D
Replace SVGA card
No
E
Replace
Motherboard
Assembly
Yes
Video to flat-
panel display
OK?
Yes
Go to Primary
Trouble Isolation
No Display Trouble Isolation Flowchart
Go to Power Supply
No
Trouble Isolation
Go to To check the
Yes
backlight Inverter
voltages
54830F02
Chapter 5: Troubleshooting
Primary Trouble Isolation
5–9