Agilent Technologies HP 8719D Service Manual page 204

Release the (j+EET') key
3.
Release the @FFii key and watch for the
Note that the far right LED always remains on.
4. Observe and evaluate results
If the above sequence is observed, and the far right LED remained on, go
q
to "Display Troubleshooting (A19, AH). n
If the right LED does not remain on, replace the A7 CPU assembly and
q
repeat the three LED pattern checks.
If the LEDs are held in any one of the patterns shown in 'Ihble 6-1, and
q
have the corresponding error message, replace the A7 firmware ICs.
in Chapter 13, "Replaceable Parts.")
.
.
.
.
.
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Pattern 2
Pattern 3
Pattern 4
Pattern 5 - two left LEDs flicker
l
. .
. . ROM 2L FAIL
. . ROM 2M FAIL
sequence shown below.
rapid
Digital Control Troubleshooting