HP Z1 G3, Руководство по техническому обслуживанию и ремонту

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Solving internal display problems
Problem Cause Solution
Blank screen (no video). Cable connections are
not correct. 1. Verify the LCD display cable connection to J202 on the system board
and to the internal LCD panel connector.
2. Verify the LED backlight cable connection to P190 on the system
board (see item 19 on
System board components on page 5 ) and to
the LED power connector on the internal LCD panel.
Screen blanking utility
installed or energy
saver features enabled. Press a key or the mouse button and, if set, enter your password.
System ROM is bad;
system is running in
FailSafe Boot Block
mode (indicated by 8
beeps). Reflash the ROM using a SoftPaq.
Computer is in
Hibernate mode. Press the power button to resume from Hibernate mode.
Backlight circuit on
motherboard is
damaged. Replace the motherboard.
The display works
properly during the POST
but goes blank when the
operating system starts. The display settings in
the operating system
are incompatible with
the internal LCD panel. For Windows:
1. Restart your computer in Windows Safe Mode.
2. Uninstall the graphics driver for the graphics controller (Intel HD
Graphics or NVIDIA Graphics).
3. Reboot in normal Windows mode.
4. Install the latest graphics driver for the graphics controller you are
using (Intel HD Graphics or NVIDIA Graphics).
Backlight level is turned
all the way down in
software environment
settings This can happen if a utility has been used to set it to a very low level.
Resetting to a usable value requires actions typically using the same utility
that was originally used. Some OSes and environments may have other
means for resetting.
Power LED flashes red
three times with long
beeps, followed by three
short beeps, while LED
flashes with short beeps,
and pattern repeats. Prevideo graphics error. Try these solutions in this order:
● Reseat the graphics card if using nVidia graphics; reseat the
processor if using Intel HD Graphics.
● Replace the graphics card if using nVidia graphics or replace the
processor if using Intel HD graphics.
● Replace the system board.
Processor does not
support graphics
output and no discrete
graphics card is
installed. Try either solution:
● Install a processor with Intel HD Graphics.
● Install a supported graphics card.
Dim characters Brightness and contrast
controls are not set
properly. In Windows, go to Control Panel, select Power Options, and then adjust
the internal LCD panel brightness and contrast controls using the Screen
Brightness slider bar at the bottom of the window.
Cables are not properly
connected. 1. Open the computer.
Troubleshooting scenarios and solutions 55