HP ZE4900 - Manual (Page 50)

2–12 Maintenance and Service Guide
Troubleshooting
Flowchart 2.6—No Video, Part 1
A
No video.
Adjust
brightness.
Y Y
N
Done
N
Check for bent
pins on cable.
Replace
system
board.
Y Y
N N
*NOTE: To change from internal to
external display, use the hotkey
combination.
Internal
External
N
Y
Done
Done
Press display
switch to ensure
operation.
Done
Replace the following one at a time. Test after each replacement.
1. Cable between notebook and notebook display (if applicable)
2. Inverter board (if applicable)
3. Display
4. System board
Adjust
brightness.
Internal or
external
display*?
Video OK?
Video OK? Done Video OK?
Video OK?
Try
another
display.
Internal and
external
video OK?