N9030B PXA Signal Analyzer Service Guide 65
Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
6. With the instrument turned off, and the AC power cord removed, remove
the Fan Assembly including unplugging all fans from the A8 Motherboard.
Refer to Chapter 16, “Assembly Replacement Procedures”, on page 429 in
this manual.
7. Turn the instrument power back on and measure the fan voltage at all
three of the fan connectors (J6, J7, & J8) on the A8 Motherboard.
Each connector has three pins. The outer conductors on all connectors are
the FAN_P supply and the center conductors are FAN_N. The voltage
between FAN_P and chassis ground should be between +7 and +15 VDC
on all three connectors.
Does the A8 Motherboard fan connector for the fan(s) that do not work
have the required voltage level?
If yes:
Replace the fan(s) that is not working
If not:
After verifying that the connections between the A7 Midplane board
and the A8 Motherboard are mechanically and electrically secure
replace the A8 Motherboard.
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 “Green
Power On LED Does Not Illuminate” section before proceeding.
1. Remove the AC power cord and then remove the instrument cover. Refer
to Chapter 16, “Assembly Replacement Procedures”, on page 429 in this
manual.
2. Remove the Top Brace. Refer to Chapter 16, “Assembly Replacement
Procedures”, on page 429 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. Refer to the "A7 Midplane Board Assembly
Troubleshooting" on page 310.
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