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Troubleshooting
Check Items When Trouble Occurs
Check Items When Trouble Occurs
The system does not start up (Nothing is displayed)
o
o
If normal operation does not resume after taking the above measures, there is
the possibility of a failure. Unplug the power cable immediately and contact
Keysight Technologies's Customer Contact, listed at the end of this guide, or
the company from which you bought the device.
Occasionally, there are missing pixels or constantly lit pixels, but this is not
a malfunction and does not affect measurement results.
The system starts up, but the normal measurement screen does not appear
(Service Mode)
The Service Mode is a state that occurs when the power-on test fails. Here, the
characters on the display turn yellow and all of the front panel keys are
unavailable.
o
o
When the normal measurement screen does not appear, there is the possibility
of a failure. Contact Keysight Technologies's Customer Contact, listed at the
end of this guide, or the company from which you bought the device.
An overload message is displayed
An overload is often detected by the E4980A/AL when nothing is connected to
the UNKNOWN terminal.
For conditions where overload occurs, refer to
Measurement Results" on page
If the measurement/DCR/DCI ranges are set at Hold, enable the auto to select
the optimum range. Then set the range at Hold. This may solve a overload.
Keysight E4980A/AL Precision LCR Meter
Confirm that the power cable is properly plugged in.
Confirm that the fuse is not blown.
Confirm that the power-on test or a self test has failed.
When the power-on test at start-up fails, the error message "Power on test
failed" is displayed in the system message area.
For details on the Service Mode, refer to the Service Guide.
When the power is turned on with the interface board of the E4980A/AL
rear panel removed, the E4980A/AL enters the service mode. In this case,
reset the interface board and then turn the power on.
The E4980A/AL also enters the service mode when the interface board isn't
set properly.
"Displaying Errors instead of
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