HP Z1 Maintenance And Service Manual page 76

Table 4-3
Problem
Blurry video or
requested resolution
cannot be set.
The picture is broken
up, rolls, jitters, or
flashes.
Some typed symbols do
not appear correctly.
68 Chapter 4 Diagnostics and troubleshooting
Internal LCD display problems (continued)
Cause
Correct video drivers
were not loaded after
graphics controller
upgrade.
The internal LCD panel
cannot display
requested resolution.
The graphics driver is
not working properly.
The internal LCD panel
connections to the
motherboard might be
faulty or the panel
might be incorrectly
adjusted.
The graphics driver is
not working properly.
The font you are using
does not support that
symbol.
The LCD panel
resolution is not
properly set.
The graphics driver
does is not working
properly or does not
support the symbol set
with that resolution.
Solution
Install the video drivers included in the upgrade kit, or download and
install the latest drivers for your graphics card from
http://welcome.hp.com/country/us/en/support.html.
1. Change the resolution to either 2560 x 1440 or 1280 x 720.
2. Update the graphics driver to the latest version available for your
graphics controller.
1. Boot into the OS and uninstall the graphics driver.
2. Restart the computer.
3. Install the latest graphics driver for your graphics controller.
Open the computer.
1.
Verify the LCD display cable connects J16 on the system board to
the display connector on the internal LCD panel.
2. Verify that the LCD Ssync/backlight cable connects P2 on the
system board to the sync connector and LED power connector on
the internal LCD panel.
1.
Boot into the OS and uninstall the graphics driver.
2.
Reboot.
3.
Install the latest graphics driver for your graphics controller.
Use the Character Map to locate and select the appropriate symbol.
Select Start > All Programs > Accessories > System Tools >
Character Map. You can copy the symbol from the Character Map
into a document.
Change the panel resolution in the Windows Control Panel >
Screen Resolution menu or through the control panel for the
graphics controller (Intel or nVidia).
Try either solution:
Change the panel resolution in the Windows Control Panel >
●
Screen Resolution menu or through the control panel for the
graphics controller (Intel or nVidia).
Install the latest graphics driver:
●
1. Boot into the OS and uninstall the graphics driver.
2. Restart the computer.
3. Install the latest graphics driver for your graphics controller.