HP Z23n User Guide - Page 26

Support and troubleshooting, Solving common problems

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3 Support and troubleshooting Solving common problems The following table lists possible problems, the possible cause of each problem, and the recommended solutions. Problem Possible Cause Solution Screen is blank or video is flashing. Power cord is disconnected. Connect the power cord. Power button is turned off. Press the front bezel Power button. NOTE: If pressing the Power button has no effect, press and hold the Power button for 10 seconds to disable the Power button lockout feature. Master power switch is turned off. Set the master power switch on the rear of the monitor to the On position. Video cable is improperly connected. Connect the video cable properly. See Connecting the cables on page 6 for more information. System is in sleep mode. Press any key on the keyboard or move the mouse to exit sleep mode. Video card is incompatible. Open the OSD menu and select the Input Control menu. Set Auto-Switch Input to Off and manually select the input. Image appears blurred, indistinct, or too dark. Brightness is too low. Open the OSD menu and select Brightness to adjust the brightness scale as needed. Input Signal Not Found is displayed on screen. Monitor video cable is disconnected. Connect the appropriate video signal cable between the computer and monitor. Be sure that the computer power is off while you connect the video cable. No video signal. Be sure the computer has sent out a video signal. Input Signal Out of Range is displayed on screen. Video resolution and/or refresh rate are set higher than what the monitor supports. Change the settings to a supported setting. See Preset display resolutions on page 28 for more information. The monitor is off but it did not seem to enter into sleep mode. The monitor's power saving control is Open the OSD menu and select Power Control > Auto-Sleep disabled. Mode and set auto-sleep to On. OSD Lockout is displayed. The monitor's OSD Lockout function Press and hold the Menu button on the front bezel for 10 is enabled. seconds to disable the OSD Lockout function. Power Button Lockout is displayed. The monitor's Power Button Lockout Press and hold the Power button for 10 seconds to disable function is enabled. the Power Button Lockout function. 20 Chapter 3 Support and troubleshooting

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3
Support and troubleshooting
Solving common problems
The following table lists possible problems, the possible cause of each problem, and the recommended
solutions.
Problem
Possible Cause
Solution
Screen is blank or video is
flashing.
Power cord is disconnected.
Connect the power cord.
Power button is turned off.
Press the front bezel Power button.
NOTE:
If pressing the Power button has no effect, press and
hold the Power button for 10 seconds to disable the Power
button lockout feature.
Master power switch is turned off.
Set the master power switch on the rear of the monitor to the
On position.
Video cable is improperly connected.
Connect the video cable properly. See
Connecting the cables
on page
6
for more information.
System is in sleep mode.
Press any key on the keyboard or move the mouse to exit
sleep mode.
Video card is incompatible.
Open the OSD menu and select the
Input Control
menu. Set
Auto-Switch Input
to
Off
and manually select the input.
Image appears blurred,
indistinct, or too dark.
Brightness is too low.
Open the OSD menu and select
Brightness
to adjust the
brightness scale as needed.
Input Signal Not Found
is
displayed on screen.
Monitor video cable is disconnected.
Connect the appropriate video signal cable between the
computer and monitor. Be sure that the computer power is
off while you connect the video cable.
No video signal.
Be sure the computer has sent out a video signal.
Input Signal Out of Range
is
displayed on screen.
Video resolution and/or refresh rate
are set higher than what the monitor
supports.
Change the settings to a supported setting. See
Preset
display resolutions
on page
28
for more information.
The monitor is off but it did
not seem to enter into sleep
mode.
The monitor's power saving control is
disabled.
Open the OSD menu and select
Power Control
>
Auto-Sleep
Mode
and set auto-sleep to
On
.
OSD Lockout
is displayed.
The monitor's OSD Lockout function
is enabled.
Press and hold the Menu button on the front bezel for 10
seconds to disable the OSD Lockout function.
Power Button Lockout
is
displayed.
The monitor's Power Button Lockout
function is enabled.
Press and hold the Power button for 10 seconds to disable
the Power Button Lockout function.
20
Chapter 3
Support and troubleshooting