HP M31379 User Manual

15
Function test
After repair, be sure to confirm that all functions are working.
Support and troubleshooting
The following table lists possible problems, the possible cause or each problem, and the recommended
solutions.
Table 4-1: Function test
Test item Operating description Tool used
HDMI test Confirm whether image displays correctly
on the monitor.
Computer or DVD player
VGA test Confirm whether image displays correctly
on the monitor.
Computer or DVD player
Table
4-2: Solving common problems
Problem Possible cause Solution
Screen is blank or video is
flashing.
Power cord is disconnected. Connect the power cord.
Monitor is off. Power the 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.
Video cable is improperly connected. Connect the video cable properly.
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.
Check Video Cable 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.
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.
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.
On-Screen Menus are
Locked is displayed.
The monitor’s OSD lock function is
enabled.
Press and hold the Menu button on the front
bezel to 10 seconds to disable the OSD
lockout function.
Power Button is Locked
is
Displayed
The monitor’s power button is locked.
Press and hold the power button for 10
seconds to disable the power button lock
function.

HP M31379 Specifications

General

Brand	HP
Model	M31379
Category	Monitor
Language	English