Agilent Technologies 35670A Service Manual page 182

Troubleshooting the Analyzer
To perform initial verification
Step 4. If the analyzer powers up normally with no error messages (see the following
G
illustration), the screen is continually updating, but the analyzer does not respond to
key presses, use the following table to determine the probable faulty assembly.
Symptom
SYSTEM keys function but MARKER, DISPLAY,
MEASUREMENT, or number keys do not function correctly
MARKER, DISPLAY, MEASUREMENT, and number keys
function but SYSTEM keys do not function correctly
No keys function correctly
4-6
Agilent 35670A
Probable Faulty Assembly
A13 or A15 Primary Keypad
A14 Secondary Keypad
A11 Keyboard Controller