Front Panel Display Trouble Isolation - Agilent Technologies Infiniium 90000 A Service Manual

Front Panel Display Trouble Isolation

Check display cable
connection to display card
Try a golden display
card to verify failure
display work
Yes
Yes
Replace display
card
Replace LCD.

Front Panel Display Trouble Isolation

Connect external monitor to VGA port. Turn unit on.
No
and LCD
Does
Check inverter board control
front panel
display
work?
Check voltage on pin 1 of
J3 on display card. Should
No
Does
with golden
card?
No
Go to 'Primary Trouble Isolation'.
Front Panel Display Trouble Isolation
Does
display appear
on ext. monitor
?
Yes
Is
front Panel
black?
Yes
cable.
be 12V.
Is
voltage No
OK?
Yes
Replace LCD.
Does
front panel
No
display
work?
Yes
Chapter 4: Troubleshooting
Replace
No
motherboard.
Replace
display card.
Replace
inverter.
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