Keysight E5061B Network Analyzers 25
Troubleshooting
No Display Troubleshooting
Step 2. Check system fan inside.
If the system fan on the chassis inside the E5061B don't run, problem seems
in the A51 Measurement I/F board or the flat cable between the A51
Measurement I/F board and CPU module. In this case, remove the E5061B
outer cover and make sure whether the fan run or not.
If a beep and a power shutdown occur immediately after power is turned on,
there is a possibility that the fan won’t run. The power shutdown occurs the
moment the system fan stops by any anomaly. In this case, check the fan that
doesn't run.
If the power shutdown occurs without a beep, the problem seems in the A51
Measurement I/F board or the CPU module.
Step 3. Check LED of "Num Lock" key
Press "Num Lock" key on the keyboard. If the LED in the key doesn't light as
shown in Figure 2-6, a problem seems in the CPU module.
Figure 2-6 LED of the Num Lock key
Make sure the following before replacing the CPU module.
• Whether all the connections to the A50/A60 CPU Module are normal or not.
Check if there is any disconnection or connection working loose.
Step 4. Checking with the external monitor
Connect an external VGA monitor to the VIDEO output on the E5061B rear
panel.
• If something is displayed on the external monitor, the problem is present
around the LCD. Also check the A52 Front Panel I/F board because the
ON/OFF setting of the LCD backlight is controlled by the A52 Front Panel
I/F board.
• If nothing is displayed even on the external monitor, the problem seems in
the CPU module.
Step 5. Checking flat cable
Check a flat cable between the A50/A60 CPU Module and A52 Front Panel I/F
board.
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