HP 1660E Series Service Manual page 143

CHART 7
Troubleshooting
To use the flowcharts
CHART 5
PERFORM FRONT
PANEL KEYBOARD
SELF TEST
PASS YES
SELF TEST?
>-"'''-----------------------------~
NO
CHECK SIGNAL
INPUT TO
KEYBOARD
INPUT
SIGNALS
OK?
YES
NO
KEYBOARD
CABLE
CONTINUITY
OK?
NO
YES REPLACE CPU
BOARD ASSEMBLY
REPLACE
KEYBOARD ASSEMBLY
Troubleshooting Flowchart 5
016600Z9
5-7