Keysight Technologies N9040B UXA Signal Analyzer Service Guide 63
Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
Instrument Cannot Completely Load or Run the Operating System
A problem of the instrument not loading the operating system can be caused
by a few different things. It could be due to a down power supply, a processor
hardware problem, an instrument boot-up process error, corrupt disk drive,
etc.
This procedure assumes that the instrument can get past the Keysight splash
screen at power on. If it doesn't, refer to the “Instrument Hangs at the Keysight
Splash Screen” section before proceeding.
1. Verify that there are no external USB storage devices connected to the
instrument.
2. Does the instrument get far enough along in the boot process to run the
“Keysight Recovery System”?
If yes:
Run the Instrument Recovery System by referring to the “Disk Drive
Recovery Process” on page 220. If this does not correct the problem
replace the A5 Disk Drive.
If not:
Replace the A5 Disk Drive.
Troubleshooting a Blank Display
This section is intended to troubleshoot a display system problem that would
cause the internal LCD to be blank. It is assumed that the rest of the
instrument is booting up and functioning properly. To determine if the problem
is an internal display issue only, connect an external VGA monitor to the rear
panel display output. If the rear panel display output is also not working go to
the “No Keysight Splash Screen Displayed” section in this chapter.
Once it has been determined that the rest of the instrument appears to be
functioning properly there are a few possible problems that could be causing
the display to be blank. They are:
— An LCD Backlight inverter problem
— A video signal path integrity problem
— A video controller / LCD problem
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