Question about Compaq Presario Notebook

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Blank screen upon start-up

Upon startup,the screen went blank (dark) ie. windows doesnt appear as it normally should. what really is the problem?

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May ber it is screen resolution issue.
When you power up the computer press F8 key then enter in enable vga mode.
Then change screen resolution to 1024*768 then apply AND ok.

Posted on Jun 26, 2009

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  • 11 Answers

Do a repair installation

Posted on Jun 26, 2009

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1 Answer

Screen stays dark


On ALL Panasonic Toughbook Models,
if the screen stays dark I would shut-off the
Toughbook and connect an external monitor
to the VGA port (15-pin female connector),
which is usually BLUE in color.

Make sure the monitor is ON first, then
turn ON the Toughbook.

If the monitor comes on then your problem
is the backlight or possibly the inverter of the
screen.

If no image is shown on the external monitor
and the screen stays dark and you cannot
hear any startup (ie. Windows) sound, then
your video card may be defective. Very few
Toughbooks fail this way since they are
normally very very relaible but it can happen.

Good Luck
Regards,
Richard - Montreal Based
Panasonic Canada Toughbook Authorized Dealer since 1989

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Have you upgraded the OS? At boot start tapping the F-2 key, do not wait for the Dell screen. Take a look at this forum:http://www.computing.net/answers/windows-95/dell-s-bios-startup-screen/85976.html

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The part that supplies the power to the screen is gone. I recall is is called the 'exciter'. They can be replaced, so take it to a computer repair shop. Same thing happened to my Toshiba.

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You could have a defective LCD screen, If the laptop appears to be booting up and running and the hard disk is spinning and the hard disk LED light is flashing but the screen is dark then, to determine if you have a LCD screen or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
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