Question about HP Compaq 6735s Notebook

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Laptop powers up but theres no display, screen blank

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  • wim3ett Jul 15, 2010

    ive tried another screen and there is still no display, also connected an external monitor and no display still, also changed the cpu, still no display, help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  • Lauren  Castro
    Lauren Castro Jul 15, 2010

    did you try to change the battery out?

  • wim3ett Jul 15, 2010

    what do you mean by change the battery out, laptop powers up but there is no display on screen, the screen is fine, but there is no display, any help would be appreciated thanks

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  • 206 Answers

I think that you need to call the manufacturer and ask if you can get a replacement screen for your laptop i think that the screen went out

Posted on Jul 15, 2010

  • Lauren  Castro
    Lauren Castro Jul 15, 2010

    It might be that the light bulb is out.....is it an LCD screen?OR NO?

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Why is screen blank?


You never said if it worked with external monitor. You also didn't say if you tried the [fn]+[Fx] key combination on the keyboard to try and switch displays.
But, if you look at the screen closely, at an extreme angle and can faintly see the graphics then that means the backlight has blown out. For the displays with LED backlighting it's usually just a wire or circuit to repair. For the screens with CCFL (fluorescent) lighting it's a simple matter of replacing the inverter board.

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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:

  • Screen flashs on red/pink and off.
  • Picture stays on in red and slowly be come normal.
  • Picture flickering with dim display.
  • 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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