No Keysight Splash Screen Displayed - Keysight N8973B Service Manual

Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process

No Keysight Splash Screen Displayed

(Black background with white "Keysight Technologies" text)
A problem of not displaying the Keysight 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
2. Remove the MP7 Top Brace. Refer to
3. With the AC power applied and the On/Off button turned on, verify that all
If yes:
If no:
4. Connect an external VGA monitor to the rear panel display output and
If yes:
If no:
58
to Chapter 15, "Assembly Replacement Procedures", on page 389
manual.
Procedures", on page 389
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 "A7 Midplane Assembly Troubleshooting" on
page 315 of this manual.
Are all of the power supply voltages at the proper level?
Proceed to step
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.
cycle power on the analyzer.
Does the external monitor display the correct information?
Proceed to the "Troubleshooting a Blank Display"
chapter.
Replace the A4 CPU Board assembly.
section before proceeding.
Chapter 15, "Assembly Replacement
in this manual.
4.
Keysight NFA Series Noise Figure Analyzers Service Guide
"Green
in this
section in this