Question about HP Pavilion dv7-1130us laptop

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Screen is all black very hard to read. All letters are white. Bought a new LCD inverter which the old one works better. dont know what else it could be. Downloaded and upgraded software too.

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Please refer to the following article for a detailed diagnosis of your laptop's problem & a description of how to fix it:
Troubleshooting Laptop Power Failures - Faint Image on Screen

Posted on Nov 15, 2010

  • Laptop Guy Dec 02, 2010

    Could be bad LCD screen.
    How to remove LCD screen and inverter board from HP Pavilion dv7 notebook


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Bought a new screen yesterday, and is seems that every letter has i white shade before it.

Go into the setup menu for the video card in your computer and tone down the sharpness control. Watch the monitor when you're doing that so you don't make it out of focus.

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Changed the lcd screen but all i have is a white screen

1) Loose connection of the Video Cable TO the motherboard, and/or TO the back of the LCD screen.

Can easily happen when reassembling.
(If you can't reuse the sticky tape on the back of the LCD screen, that holds the Video Cable to it, use more tape )

2) Incompatible LCD screen.
MATCH up the manufacturer's numbers on the back of the old LCD screen, to the new one.

They MUST crossover, and match up, if they are two different LCD screen manufacturers.

The screen Inverter is MATCHED to the LCD screen, also.

Matching up the Model Number, (Product Number for HP), may not be all the info you need.
Matching the numbers off of the old screen, for the new one, is.,Mini,1000,Laptop,LCDs-Displays.aspx

Under the red heading - Find Your Spare Parts - click on the blue Down Arrow to the right of the - Choose Model - box.
What Model is yours?

Write down the manufacturer and product ID number.
Now go to the far upper left of the page. In the box under - Part Number Search, type the letter/numbers for your old LCD screen.

On the page that comes up. Do they match?
Putting the letter/numbers in for the LCD screen you just purchased.
Do they match?

IF the old LCD screen works at all, reconnect it, and see if it works.
If so the LCD screen you purchased does not.

3) Make SURE the screen Inverter cables (Wires) are connected tightly.

[ Check the connection of the Video Cable to motherboard first.
Then the Inverters wires, then the Video Cable connection at the back of the LCD screen ]

An LCD screen cannot produce light. It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL or a series of LED lights

The HP Mini 1000 series of Netbook PC's uses a CCFL.
Cold Cathode Fluorescent Lamp.

Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

OR a series of LED lights. Depends on the model. (8.9 inch LCD screen models usually use CCFL. 10.1 models usually use LED lights)

A screen Inverter (FL Inverter) is used to convert power from the laptop, for the Backlight, and LCD screen.

Make sure there is 6 Volts DC power going through the Inverter.

90 PERCENT OF THE TIME the fault is the Inverter ]

HP Mini 1000 and Compaq Mini 700 - Maintenance and Service Guide

For additional questions please post in a Comment.


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1 Answer

Hi i recently started having problems with my dell inspiron 1545 screen. At first it started to freeze and fade to bright white, eventually after a few days it became stuck white even after booting the...

Hi lewis haywar,

Try to replace the LCD inverter in your laptop. Most common issues on LCD are due to failing LCD inverter. It fails more often than LCD cable or LCD backlight does.

Please let me know if this solution helped to resolve your issue.

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1 Answer

My monitor runs for about 4 seconds then blacks out. turn it off and on again an it comes on for another 4 seconds before blacking out. Any ideas? Larry

larryz 10, Did it work ok before this "black screen of death" started to occur?? Have you done any OS changes to the pc? Is unit still covered by warranty? Will "known good" old monitor work ok with pc? Have you performed the "flashlight test" that all cold cathode fluorescent lamp back-lit lcd monitor owners should know and understand the results of when black screen of death rears it's ugly head??? If BSOD not caused by software, could be problem with the monitor's internal "switch mode power supply/ccfl inverter supply" going into partial shut down (you see very faint image when flashlight is 1 inch from screen) or full shutdown ( no see image)!!! If +12v dc rail goes to shut down, then CCFL tubes will go off!!! No white light! If you do not know how the new style, screw-in curlie-Q, energy efficient, CFL light bulbs work, then go visit YOUTUBE for some video clips of ANY BRAND of CCFL back-lit lcd monitors having their SMPS/inverter supply being repaired. Remember this: Your lcd monitor isn't any different than any other brand in it's basic engineering design and mode of operation!!! If and when the "white LED" back-lit monitors hit the store shelves, then and only then will the CCFL electronic (600vac to 1000vac) ballast become history. Do some reading at this very old (2005) blog, even though not your model hp display. After you do your research, return here if you require more help or feel you have been helped by this response and would care to give it a rating on fixya. Good luck with the repair. 12fixlouie north of Windy City.

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L1910B (Black) 19 in. Flat Panel LCD Monitor: I have a flashing monitor light and the monitor is...

Guest, If your Lucky Goldstar l1910B is 4-5 years old you will need to trade it for new or investigate the printed circuit board "switch-mode-power-supply/inverter supply to do repair on it. Depending on total "on" hours of use, may even need to refurbish with new cold-cathode-fluorescent-lamps" that provide "white-light" needed to see what is being displayed on screen. Just do some reading in my old fixya profile (louie12fix) for more info. After you do your research and have learned the flashlight test you will be able to make decision on what to do knowing all your options. You can type in the fixya nickname of most ccfl monitor tech's and read their profiles "budmrtn" "buddymc" "louie12fix" and mant more. Follow all links you find in the responses to "black" or Blank n Black screen ccfl lcd display problems. Good luck on the repair. 12fixlouie

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