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Monitor display is blank
The most common reason for a monitor to be blank is that it's turned off, or it's hibernating or on
a screen saver and will wake up with input. Assuming that's not the case, then troubleshooting
involves identifying whether the issue is with the monitor or with the device it's connected to.
Either way, there's some steps you can take to try to get it working again.
1. Disconnect and reconnect the video cable at both ends.
A loose or defective cable can easily cause a blank screen, even if the cable appears
plugged in or has previously been working fine.
If the issue continues or if the cable is damaged, replace the cable. Also, make sure to use
the best type of cable available: when both the external device and monitor support
it, the best type of cable to use is an HDMI or Displayport cable, followed by a
DVI cable, then a VGA cable.
Note: Only use one video cable to connect your monitor to your device. If you
use two, the monitor may be looking for a video signal on the wrong one.
2. Select the right source.
Most monitors will automatically select the source that is sending a video signal, but
sometimes the wrong one will be selected (especially if multiple devices are connected to
the monitor) or you will need to manually select it. You can change the source with the
buttons on the monitor or in the menu. See your
Make sure the source matches the port on the back of the monitor that your external
device is connected to.
3. Connect your blank monitor to a computer and access the computer's operating
system.
Note: If the monitor works when the computer is booting up, but is blank after the
operating system loads, service is not required, and the issue is with your computer.
You can try booting into Safe Mode to access the operating system. (On earlier versions
of Windows, you can do this by pressing F8 repeatedly as the computer is booting. On a
Mac, press and hold the Shift key until the Apple logo appears.)
If the monitor is completely blank even when the computer is booting up, you'll need to
connect a second, working monitor. Make sure it is set as your main monitor, and leave
the blank monitor connected.
user manual
for instructions, if needed.
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