Function Test; Support And Troubleshooting - HP M27fw Maintenance And Service Manual

Function test

After repair, be sure to confirm that all functions are working.
Table 4-1: Function test
Test item
HDMI test
VGA test

Support and troubleshooting

The following table lists possible problems, the possible cause or each problem, and the recommended
solutions.
Table 4-2: Solving common problems
Problem
Screen is blank or video is
flashing.
Image appears blurred,
indistinct, or too dark.
Check Video Cable is
displayed on screen.
Input Signal Out of
Range is displayed on
screen.
The monitor is off, but it
did not seem to enter into
Sleep mode.
On-Screen Menus are
Locked is displayed.
Power Button is Locked is
Displayed
Operating description
Confirm whether image displays correctly
on the monitor.
Confirm whether image displays correctly
on the monitor.
Possible cause
Power cord is disconnected.
Monitor is off.
Video cable is improperly connected.
System is in Sleep mode.
Video card is incompatible.
Brightness is too low.
Monitor video cable is disconnected.
Video resolution and/or refresh rate
are set higher than what the monitor
supports.
The monitor's power saving control is
disabled.
The monitor's OSD lock function is
enabled.
The monitor's power button is locked. Press and hold the power button for 10
Tool used
Computer or DVD player
Computer or DVD player
Solution
Connect the power cord.
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.
Connect the video cable properly.
Press any key on the keyboard or move the
mouse to exit Sleep mode.
Open the OSD menu and select the Input
Control menu. Set Auto-Switch Input to Off
and manually select the input
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 you
connect the video cable.
Change the settings to a supported setting.
Open the OSD menu and select Power
Control > Auto-Sleep Mode and set auto-
sleep to On.
Press and hold the Menu button on the front
bezel to 10 seconds to disable the OSD
lockout function.
seconds to disable the power button lock
function.
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