No Agilent Splash Screen Displayed - Keysight n9020a Service Manual

Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process

No Agilent Splash Screen Displayed

(Black background with white "Agilent Technologies" text)
A problem of not displaying the Agilent splash screen could be caused by many
different things. It could be due to a down power supply, a processor hardware
problem, an instrument boot-up process error, a display section failure, etc.
This procedure assumes that the green Power On LED on the front panel does
turn on when the instrument is turned on. If it doesn't, refer to the
Power On LED Does Not Illuminate"
1. Remove the AC power cord and then remove the instrument cover. Refer
to Chapter 14, "Assembly Replacement Procedures", on page 435
manual.
2. Remove the MP7 Top Brace. Refer to
Procedures", on page 435
3. With the AC power applied and the On/Off button turned on, verify that all
of the power supply voltages are at their proper level. This can easily be
done by viewing the power supply LEDs on the back side of the A7
Midplane board. See
page 327
Are all of the power supply voltages at the proper level?
If yes:
Proceed to
If no:
After verifying that the connections between the A6 Power Supply,
the A7 Midplane board, and the A8 Motherboard are all
mechanically and electrically secure, replace the A6 Power Supply
assembly.
4. Connect an external VGA monitor to the rear panel display output and
cycle power on the analyzer. If power is not cycled, the CPU might not
recognize that an external monitor is connected.
Does the external monitor display the correct information?
If yes:
Proceed to the
chapter.
If no:
Replace the A4 CPU Board assembly.
in this manual.
"A7 Midplane Assembly Troubleshooting" on
of this manual.
step 4.
"Troubleshooting a Blank Display"
57
section before proceeding.
Chapter 14, "Assembly Replacement
"Green
in this
section in this