Table of Contents
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Items
Tips and tricks
Blinking lights
Items
Symptoms
Lights blink on keyboard
lock/num lock
keys
Note
Diagnostics error messages
Items
Symptoms
●
Computer has power
●
POST error message displays
(Windows logo has not yet
appeared)
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
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
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.
Procedures
Possible causes
caps
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
troubleshooting lights, and POST error messages on page
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
Reseat cables and connections on page
Since the display may not be functional, lights are used to indicate an error.
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
(11. Test with minimum configuration on page
Display on page 109
section.
(7. Status lights, blinking light codes,
84) for corrective actions.
87) one at a time.
Common issues and possible solutions
88) by
(10.
99
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Table of Contents
Troubleshooting
