Function Test; Support And Troubleshooting - HP 27MQ Maintenance And Service Manual

Function test

After repair, be sure to confirm that all functions are working.
Table 4-1: Function test
Te Test item
Function test
st item
HDMI test
HDMI test
D-SUB test
DP test
Table 4-1: Function test
Support and
Audio test
The following table lists possible problems, the possible cause or each problem, and the
recommended solutions.
Table 3-1 Common issues and solutions
Issues
Screen is blank or video is
flashing.
Image appears blurred,
indistinct, or too dark.
"Check Video Cable" is
displayed on the screen.
"Input Signal Out of Range" is
displayed on screen.
The monitor does not enter
into a low-power sleep state.
"OSD Lockout" is displayed.
"Power Button Lockout" is
displayed.
Operating description Operating description
Confirm whether image displays and sound plays
After repair, be sure to confirm that all functions are working.
correctly on the monitor.
Confirm whether image displays and sound plays
correctly on the monitor.
Confirm whether image displays and sound plays
correctly on the monitor
Confirm whether image displays and sound plays
correctly on the monitor.
troubleshooting
Change volume and balance to confirm whether
volume is smooth and loud enough.
Possible cause
Power cord is disconnected.
Monitor is off.
Video cable is improperly connected.
System is in Auto-Sleep Mode.
Video card is incompatible.
Brightness setting is too low.
Monitor video cable is disconnected.
Video resolution and/or refresh rate
are set higher than the monitor
supports.
The monitor's power saving control is
disabled.
The monitor's OSD Lockout function
is enabled.
The monitor's Power Button Lockout
feature is enabled.
Solution
Connect the power cord.
Press the monitor power button.
If pressing the power button has no effect, press and
NOTE:
hold the power button for 10 seconds to disable the Power
Button Lockout feature.
Connect the video cable properly. See
on page 7 for more information.
Press any key on the keyboard or move the mouse to
inactivate the screen blanking utility.
Open the OSD menu and select the Input menu. Set Auto-
Switch Input to Off and manually select the input.
or
Replace the video card or connect the video cable to one of
the computer's on-board video sources.
Open the OSD menu, and select Brightness to adjust the
brightness scale as needed.
Connect the appropriate video signal cable between the
computer and monitor. Be sure that the computer power is off
while connecting the video cable.
Change the settings to a supported setting (see
resolutions on page 26).
Open the OSD menu and select Power, select Auto-Sleep
Mode, and then set auto-sleep to On.
Press and hold the Menu button for 10 seconds to disable the
OSD Lockout function.
Press and hold the Power button for 10 seconds to unlock the
power button function.
Tool used Tool used
Computer or DVD
player
Computer or DVD player
Computer or D-SUB
player
Computer or DVD player
Speaker
Connecting the cables
Preset display
19