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Posted on Mar 09, 2009
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My compaq preasrio r3000 black screen cant conect to an external

Monitor either. will a new LCD inverter R4000 R3000 V5000 will work

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  • 3 more comments 
  • Anonymous Mar 12, 2009

    yes the lap top boots but no picture. i did conected to an out side monitor still did not work it seems I fry the video card but it seems that the video card is integrated to the mother board . so my question now is can it be repair.??? pls let me know if it woth it to send it to a center to repair it.

  • pMan860507 Apr 11, 2009

    mine happened after i repaired the soder joints for the power. though im having the same problem i tried to connect it to external monitor though im not sure if i have to use the button to change the output to the external monitor. i am getting a completely blank screen.

  • Anonymous May 11, 2010

    the vid card might not be fried the drivers might have been disabled or lost/broken can you see anything while it boots up? pman cant help you srry

  • Anonymous May 11, 2010

    Does the laptop boot up at all?

    If not, reseat the memory modules.

    Did you connect an external monitor to the video output and boot up the laptop, did you get an image?

  • Anonymous May 11, 2010

    If it's completely black an inverter won't change anything.

    Can you see anything at all?

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John Porter

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  • Posted on Jul 14, 2009
John Porter
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Have you any other A/V ports out ie Svid etc if so try that via an A/V lead, if that works reset your bios settings to minimal settings, if that doesnt work search the 'net someone somewhere has had the same problem! try shining a flashlight/lamp onto the screen whilst booting up, if you see anything on the screen then your inverter is definatly gone and yes it could still be your inverter! your laptop may have software/hardware issues with an external monitor?

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Compaq presario v5000 dark screen and failing hard drive
The problem you described, is related to the inverter board.
There's a little board, that take care of lights on the monitor. You must replace the inverter board to solve the problem.

Here you have an image, of an inverter board.

ed452f58-06a1-44e2-8fe4-71fd08bc1dd5.jpg

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Inverter boards, it's dangerouse to replace yourself if you don't know what you are doing. High-Voltage inside :)
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Lines on the screen means the LCD is bad and needs to be replaced. The inverter just makes sure the lcd turns on. That wouldn't cause lines on the screen.


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Nov 28, 2009 • Compaq Presario R3000 Notebook
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Problem with my screen
You could have a defective screen - a defective inverter or a CCFL lamp.
To determine if you have a LCD screen or video card problem, read this and follow the instructions.

Defective CCFL backlight, it may have the following symptom:
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  • 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 it up, 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 for parts, repair service and DIY info.
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May 11, 2009 • Compaq Presario R3000 Notebook
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If you already replaced the inverter and the screen still continues dark, you need to replace your lcd screen. Your video card is good due you have signal with external monitor.
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My LCD screen is only 10% viewable
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