Agilent Technologies HP 8719D Service Manual page 218

If a controller is available, write a simple command to the analyzer. If the
analyzer successfully executes the command, the problem is either the A2 front
panel interface or W17 (A2 to motherboard ribbon cable) is faulty.
Run the Internal Diagnostic 'ksts
The analyzer incorporates 20 internal diagnostic tests. Most tests can be run as
part of one or both major test sequences: all internal (test 0) and preset (test 1).
internal tests.
2. Then press (TJ IxlJ to see the results of the preset test. If either sequence
fails, press the &) @) keys to find the first occurrence of a FATL message for
tests 2 through 20. See 'Ihble 6-3 for further troubleshooting information.
Digital Control Troubleshooting