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HP Pavillion dv9500t lcd screen is extremly dark. I can barely see anything once it is booted up. I can hook up an external monitor and the laptop functions properly with exception of the laptop screen. I have gone through all of the hp recommendations to check. Is their a backlight lamp or something that I can replace? Iam not familiar with the new ultra bright screens.

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From the Windows desktop, hold the fn key and press the f7 key HP Pavillion dv9500t lcd screen - c00776226.jpg to increase or the f8 key c00776225.jpg to decrease the brightness of the display. If using the function keys does not resolve the problem and you have a Lid Actuator on your particular model, check the movement of the Lid Actuator switch to determine that it moves freely and is not stuck. NOTE: The key numbers ( f7 or f8 ) may vary depending on the notebook PC; however, the images on the keys should be familiar. Check the movement of the Lid Actuator switch The Lid Actuator switch is available on some models. It is a small button or switch located above the keyboard near the hinge for the LCD. Pressing this switch when the computer is on may turn the notebook display off, or it may cause the notebook to enter a different power state. Press the switch two to three times while observing the display. If the display does not return to normal brightness when the switch is released, the switch may be sticking and need to be repaired. Contact HP service and support for further assistance. If the display turns off when the switch is pressed, the power management function may be set to hibernate or turn off when the lid is closed. Install updated BIOS and drivers To resolve certain hardware and software issues, use HP Health Check to automatically search the HP web site for an updated BIOS as well as any updated software and drivers. To launch HP Health Check, follow the steps below.

  1. Click Start , type health into the search field, and then select HP Health Check from the list. HP Health Check displays a list of available BIOS, software, and driver updates for your particular model.
  2. Click the description link for any BIOS, software, or driver updates, and then follow the on-screen instructions. You can only install one update at a time.
  3. Repeat steps 1 and 2 above for all updates that you want to install.
You have now installed the available BIOS, software, and driver updates for your particular computer model.

Posted on Nov 15, 2008

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Check the monitors native resolution (you can get it in their website's technical specification area and set the same resolution in your windows resolution.

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No Graphics


Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad. If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.

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My sony viao vgc-va10g has power but screen wnt turn on .


Shine a flashlight on the dark screen to see if you barely see the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can be any kind of monitor even the old big fat crt monitors as long as it has a vga cable to connect to your computer's vga port. If so that proves your video card is ok. The video will show on most systems when you reboot without you having to do anything. Some systems will require you to hit the FN (Function key) + F1 thru F12. Hold down the FN key then hit the correct key for displaying on the monitor (F1 thru F12). The correct key will normally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works, then your screen is bad. If you see no icons by shinning the flash light and nothing shows on the external monitor, then most likely your video card is bad.

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1 Answer

I have a hp laptop. was on line and screen went black. and will not show again. it strats up sounds but black screen.what do i do


1) Do you have a VGA monitor that you can use for an external monitor?
{VGA monitor is also referred to as a CRT monitor. Looks like a small TV}

The back of the laptop, or side, has a VGA port. The VGA monitor is plugged into it.
{Laptop off}
Then the VGA monitor is turned on, and allowed to 'come to life'.

Now turn on the laptop. Press the Fn key down on the keyboard, and hold it down.
Now press the Monitor toggle over key.
Since you did not state the HP laptop Model Name, and Model Number, I can only give you generic guidance on this.

The monitor toggle over key has a monitor screen symbol on it. It will be one of the F keys.

(It's an External Monitor toggle key.
Press it one time and the display toggles over to an external monitor.
Press it again, and both the laptop LCD screen, and the external monitor have a display on them.
Press it once more, and the display goes back to the laptop's LCD screen )

If display shows up on the external monitor, you have a problem with the display of the laptop.

Primer:
An LCD screen cannot produce enough light by itself. It needs an additional light source.
A Backlight is used as an additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp {Bulb}
Similar to the fluorescent lighting used in homes and businesses, but on a MUCH smaller scale.

{Average Backlight is 3 to 5 inches long, and half the diameter of a No.2 pencil.
The Backlight is located on one edge of the LCD screen}

An Inverter is used to provide power for the LCD screen, and the Backlight.

90 percent of the time the problem is the Inverter.

Inverters are relatively cheap, and if I knew the Model Name, and Model Number of your HP laptop, I could give you a link to HP Support where you could download the Service Manual for free.

This way you would have a manual to show, and detail how to replace the Inverter, and I could guide you.

I could also give links for your perusal for Inverters.

There is one more thing however.

HP Pavilion DV2000, DV6000, and DV9000 series laptops, have a graphics chip overheating problem.
The laptop comes on, the blue indicator LED lights light up, but the LCD screen is black.

This video explains why, shows a solution to fixing the problem, and details out a lot more than I am privileged to state here,

http://www.youtube.com/watch?v=bnkQNmKauEc

Have further questions regarding any of the above, please state in a Comment.
(Believe upper right of your page)

Regards,
joecoolvette

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1 Answer

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If you hear it boot up and don't see anything on the screen, I would first try the keystroke combo that sends your video to an external monitor. It's the Fn key and one of the special function keys--has a picture of two monitors on it, probably.
Then connect an external monitor to see if it's the LCD screen. If you can get a signal on the external monitor but not the LCD, then you'll need to repair the LCD. Could be the inverter or the screen itself.
var fctb_tool=null; function FCTB_Init_6eee97f86fa0421e815d598ae5f87e37(t) { fctb_tool=t; start(fctb_tool); } var fctb_tool=null; function FCTB_Init_52e28f3d23ef435bb8261d75a77c93c1(t) { fctb_tool=t; start(fctb_tool); }

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1 Answer

I have an hp pavillion laptop that has not worked in a few months first the screen was black when you turned it on. now i can see the screen somewhat but not 100% its dim please help


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You may need to check your desktop image for your monitor and change it to something lighter
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Without taking it apart myself, it could be some wiring from the laptop to the screen


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