Troubleshooting Procedure 1 Remove all remote I/O connections and front panel connections to the instrument. Verify that: a. the AC mains power cord is securely connected to the instrument and plugged into a live outlet b. the front panel Power On/Standby switch has been pushed 2 If the standby light below the power switch is not illuminated, re-verify the items above. If all this is correct, check the AC mains power and then the internal line fuse. 3 Turn the instrument on. If the power-on sequence completes and the display appears to function properly, verify that the instrument is in local mode, and run the self-test ([Utility] > Test/Admin > Self-Test). If the display is illegible, replace the front panel board. CAUTION Ensure that all connections (front and rear) are removed when self-test is performed. During self-test, errors may be induced by signals present on external wiring, such as long test leads that can act as antennas.
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