Troubleshoot an HP LCD Monitor
HP makes a number of liquid crystal display, or LCD,
LCD monitors create an image by passing light through a
liquid crystal solution that either blocks the light or allows it to pass
through to a color filter.
LCD monitors are ideal for use with a computer as they
present an excellent still image and cannot suffer pixel burn-in like other
flat-screen display technologies.
Even quality monitors run into the occasional problem and
need some basic troubleshooting before sending them in for service.
Check the power cord to make sure that it is plugged in
securely to both the monitor and the outlet. If you are using a surge
protector, remove it and plug the power cord directly into an outlet that you
know is working.
Detach and reattach both ends of the cable running from
your computer to your monitor.
If your HP LCD monitor has more than one
connector, use the other one to make sure that the connector isn't the issue.
Remove any switch or extension cable that may
be present between the computer and the monitor.
Restart your computer. A fresh start will
correct many software issues.
Check the documentation of your video card to
make sure that it supports HDCP, or High Bandwidth Digital Content Protection,
since the screen may be blank when you are trying to watch high-definition
content through a video card that doesn't support it.
Some older HP LCD monitors also do not support
HDCP, so check your monitor documentation as well.
Go to your video card manufacturer's website
and install the latest drivers for your video card. Instructions for installing
the drivers will vary by manufacturer, but they should be listed with the
Change your resolution to a preset video mode
to make sure that you aren't trying to operate the monitor in an unsupported
Different models of HP LCD monitors support
different preset video modes.
All of the preset video modes for your monitor
are listed in your monitor's manual.
Resolutions of 1024 x 768 and lower are
supported by almost all HP LCD monitors.
Press the "Auto/Select" button on
the front of the HP LCD monitor to correct any images that are dark or blurry.
If this does not correct the image, press the
"Menu" button on the front of the monitor to bring up the on-screen
display menu, where you can use the "+" and "-" buttons to
scroll through the options and "Enter" to select the option that you
want to change.
Adjust the brightness and contrast as needed
by selecting them and using the "+" and "-" keys. Press the
"Menu" button to exit the menu.
Press the "Menu" button to enter the
menu, scroll to "Image Control" and press "Enter."
From here you can choose the
"Auto-Adjustment" option and the HP LCD monitor will automatically
adjust the horizontal and vertical positioning to center the screen.
The ability to adjust these settings is
available only if you are using VGA inputs.
Contact your retailer or manufacturer for any
additional troubleshooting steps for your particular model of HP LCD monitor.
If your monitor still has issues, you may need
to send it in to be serviced.
Fix a White Screen on an LCD Monitor
LCD screen has turned completely white, there are three normal causes: the
screen is defective, the video cable is not connected correctly, or the
graphics card on the motherboard of the computer is faulty.
You will need to troubleshoot these possibilities to
determine which problem you have.
If you are not experienced in working on computer equipment,
you should not attempt to disassemble your LCD screen because you could easily
Seek professional assistance unless you have experience
working on computer hardware.
Disconnect the white LCD screen from the computer by unscrewing the blue
monitor cable. Connect the working LCD screen to your computer by attaching its
blue monitor cable to the same slot.
If your computer display does not show on the functioning
LCD screen, try rebooting your computer.
If it still does not display, the problem is with your
computer's graphic card on the motherboard. Seek professional repair
If your computer
display shows normally on the working LCD screen, proceed to Step 2.
Unplug the LCD monitor with the white screen.
Disassemble the rear panel of the monitor with the small
Carefully separate the screws into piles so that you can
keep track of how to reassemble the monitor.
Locate the internal video cable, a gray cable with a plug on
the end that connects to the main components of the screen.
See the References section for photos of the video cable for
Unplug the cable, checking for any debris or blockage.
Reconnect the cable firmly.
Reassemble the LCD screen. Plug it in and connect it to your
If the screen is still white, you have a defective LCD screen.
You will need to replace it or take it to a professional
repair service for assistance.
Without this test you'll have to guess because as I
mentioned before this could either bad motherboard or bad LCD screen.
You'll have to disconnect the video cable from the LCD
screen (connector 2) and the inverter board (connectors 3 and 1).
After that you connect another working screen and test
For this purpose I'm using one of my test LCD screens.
My test screen is cracked and because of that you see a wide
white band in the center but it still works fine for this test.
The original screen is white but my test screen works normal
(except the crack of course) and I can see the image.
After this test I can tell that the problem must be related
to the screen.
After I assembled everything back together and connected the
original LCD, it's still white.
CONCLUSION. In my case this problem is related to the LCD screen
and it has to be replaced.