Agilent Technologies 54853A

Chapter 5: Troubleshooting
Front Panel Display Debug
5–11
Front Panel Display Debug
Turn unit on. Connect external monitor to VGA port.
Does
display appear
on monitor
?
Connect external
monitor to secondary
display port.
No
Does
display appear
on monitor
?
No
Yes
Yes
Is
front Panel
black?
Check ffc display
cable connection to
SVGA card and LCD
No
Does
front panel
display
work?
Try a golden SVGA
card to verify failure
Does
display work
with golden
card?
Replace
LCD.
Replace
SVGA card
Try a golden SVGA
card to verify failure
Does
display work
with golden
card?
Replace
motherboard.
No
Replace
SVGA card.
Yes
Check inverter board
control cable.
Yes
Check voltage on
Cap C2 of SVGA
card. Should be 12V.
Is cable
and voltage
OK?
Replace LCD.
Yes
Does
front panel
display
work?
Replace
inverter.
No
Front Panel Display Debug
Go to ’Primary Trouble Isolation’.
Yes
No
Yes
No
No
Yes