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Troubleshooting
Power Up Troubleshooting
Power Up Troubleshooting
Immediately unplug the instrument from the ac power line if the unit
shows any of the following symptoms:
— Smoke, arcing, or unusual noise from inside the analyzer.
— A circuit breaker or fuse on the main ac power line opens.
Check your network analyzer for evidence that it is powering up correctly.
Perform the following steps and make sure that the analyzer is displaying
correct behavior as noted in the following steps.
Step 1. Disconnect all peripherals and plug in the network analyzer. Before the
analyzer is powered on, the line switch should glow yellow and no other
lights should be on.
Step 2. Turn on the network analyzer.
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Step 3. If the analyzer powers up correctly, continue troubleshooting with
Panel Troubleshooting" on page
Step 4. If the analyzer does not power up correctly, follow these troubleshooting
steps:
— If the line switch does not glow, go to
— If you cannot hear the fans operating, go to
— If the line switch displays a green light and the fans are operating (audible),
— If the instrument appears to abort the network analyzer measurement
Keysight N5247B Service Guide
The line switch should glow green.
The fans should be audible.
The display should flash and then show the hardware boot-up sequence.
This process checks the RAM and communication with the solid state drive.
These checks return an error message if a problem is detected.
The Windows operating system should start.
The network analyzer measurement interface should open with an S
measurement displayed.
on page
4-12.
but the display remains dark, go to
Problems" on page
4-13.
interface process, contact Keysight. Refer to
page
2-7.
4-15.
"Power Supply Check" on page
"If the Fans Are Not Operating"
"Troubleshooting LCD Display
"Contacting Keysight" on
11
"Front
4-8.
4-7
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Table of Contents
Troubleshooting
