HP ZBook Studio x360 Maintenance and Service Guide - Page 111

Blinking lights, Diagnostics error messages, Items, Procedures, Tips and tricks

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Items Tips and tricks Procedures 1. Reseat display cable connection on system board. 2. Reseat display cable connection on display panel side. 3. Examine and reseat major components, such as hard drive, memory. 4. Test with minimum configuration (11. Test with minimum configuration on page 88) by removing hard drive to isolate operating system issues and testing video in F10 Setup. 5. If video is present, restart and retest the computer. 6. If video is present but bad, go to Display on page 109 section. 7. If issue persists (no video), test with external video. 8. If issue persists, test or replace a confirmed working display. 9. If issue persists, replace discrete graphics card. 10. If issue persists, replace system board due to defective video function. Swipe a metal piece (screwdriver) over wireless/mute buttons to act as if closing lid to force video output to external display device. See the "External component identification - Display" section for location of the magnetic sensor. Blinking lights Items Symptoms Lights blink on keyboard caps lock/num lock keys Note Procedures Possible causes Blinking lights on startup usually indicate a problem with basic functionality of a critical component (processor, BIOS, graphics cards, memory, etc.) due to loose connection, defective parts, or recently added parts. Troubleshooting steps 1. Check for any blink patterns. Count the number of blinks in a sequence, followed by a pause for a few seconds. 2. See Status, Blinking Lights, and Error Message (7. Status lights, blinking light codes, troubleshooting lights, and POST error messages on page 84) for corrective actions. 3. If internal hardware components (memory, hard drive, etc.) have been recently added, a component may not be connected properly. Remove and reseat new components (10. Reseat cables and connections on page 87) one at a time. Since the display may not be functional, lights are used to indicate an error. Diagnostics error messages Items Symptoms ● Computer has power ● POST error message displays (Windows logo has not yet appeared) Procedures Possible causes Diagnostic error messages indicate a problem. There may be a problem with the instruction being sent from the BIOS to a hardware component (e.g., keyboard failures), or incompatible hardware. Can usually be resolved by installing updated firmware for the component. Troubleshooting steps Common issues and possible solutions 99

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Items
Procedures
1.
Reseat display cable connection on system board.
2.
Reseat display cable connection on display panel side.
3.
Examine and reseat major components, such as hard drive, memory.
4.
Test with minimum
configuration
(
11. Test with minimum
configuration
on page
88
) by
removing hard drive to isolate operating system issues and testing video in F10 Setup.
5.
If video is present, restart and retest the computer.
6.
If video is present but bad, go to
Display
on page
109
section.
7.
If issue persists (no video), test with external video.
8.
If issue persists, test or replace a
confirmed
working display.
9.
If issue persists, replace discrete graphics card.
10.
If issue persists, replace system board due to defective video function.
Tips and tricks
Swipe a metal piece (screwdriver) over wireless/mute buttons to act as if closing lid to force
video output to external display device. See the “External component
identification
–
Display” section for location of the magnetic sensor.
Blinking lights
Items
Procedures
Symptoms
Lights blink on keyboard
caps
lock
/
num lock
keys
Possible causes
Blinking lights on startup usually indicate a problem with basic functionality of a critical
component (processor, BIOS, graphics cards, memory, etc.) due to loose connection,
defective parts, or recently added parts.
Troubleshooting steps
1.
Check for any blink patterns. Count the number of blinks in a sequence, followed by a
pause for a few seconds.
2.
See Status, Blinking Lights, and Error Message (
7. Status lights, blinking light codes,
troubleshooting lights, and POST error messages
on page
84
) for corrective actions.
3.
If internal hardware components (memory, hard drive, etc.) have been recently added, a
component may not be connected properly. Remove and reseat new components (
10.
Reseat cables and connections
on page
87
) one at a time.
Note
Since the display may not be functional, lights are used to indicate an error.
Diagnostics error messages
Items
Procedures
Symptoms
●
Computer has power
●
POST error message displays
(Windows logo has not yet
appeared)
Possible causes
Diagnostic error messages indicate a problem. There may be a problem with the instruction
being sent from the BIOS to a hardware component (e.g., keyboard failures), or
incompatible hardware. Can usually be resolved by installing updated
firmware
for the
component.
Troubleshooting steps
Common issues and possible solutions
99