62 Keysight Technologies N9040B UXA Signal Analyzer Service Guide
Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
Instrument Hangs at the Keysight Splash Screen
A problem of the instrument hanging at 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, etc.
1. Remove the AC power cord and then remove the instrument cover. Refer
to Chapter 15, “Assembly Replacement Procedures”, on page 347 in this
manual.
2. Remove the Top Brace. Refer to Chapter 15, “Assembly Replacement
Procedures”, on page 347 in this manual.
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 the "A7 Midplane Board Assembly Troubleshooting"
on page 233.
Are all of the power supply voltages at the proper level?
If yes:
After verifying that the connections from the A7 Midplane board to
the A4 Processor board are not at fault, replace the A4 Processor
board.
If not:
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.
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