Question about HP Pavilion dv4000 Notebook

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Dark Screen It seems my computer will turn on but I get a blank screen. I've already tried hooking to an external source with no luck. I'm guessing it is the video card? I have a HP Pavilion DV4000. What kind of video card to I need to replace it with? Seems there are PCI, PCI Express and AGP types but I'm not sure what that means. What if it is integrated on the motherboard? Please Help!

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The unfortunate answer I believe would be it is impossible to replace the video card. Laptops are built with on-board graphics cards on the motherboard. Unless your computer happens to be the first i've heard of with an expansion slot, you are out of luck....IF that's your computer's problem.. I think you should try a few more things first before you determine that's the issue. Try calling HP. Not sure if their tech support charges for phone calls but they didn't when I worked for them. It's worth a shot. Maybe they'll square you right up. :) Take care.

Posted on May 22, 2009

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The video card in a laptop is a built in device, it isn't replaceable as in the case with PC workstations. Well, anything is replaceable. You would need to replace the motherboard would be my best guess, but that may not be cost effective, depending on the age of your system.

Good luck.

Posted on May 22, 2009

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2. Check your brightness settings. While it seems like a simple oversight, the brightness on your laptop may sometimes be turned all the way down. Thus, the screen appears to be black, off or defective, when the problem is simply that the brightness is on its lowest setting. To fix the brightness, check your laptop keyboard. Most laptops have the brightness settings mapped to two keys at the top left of the keyboard, accompanied by a symbol (often a sun). Use these keys to fix your brightness, but keep in mind that some laptops require that you press the Function key at the same time as the Brightness key.

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How can i fix my laptop black screen? I can hear it coming on, but no image on the screen.


Instructions Things You'll Need:
  • AC adapter
  1. 1 Check the power source. While you have presumably already attempted to turn your laptop on and off, the problem may lie with your AC power adapter. Is the power-indicator light on the adapter on? If not, your problem may lie here. However, whether or not you have a power indicator light on your adapter, consider unplugging it and plugging it into another outlet. This may turn on your laptop and take care of your blank-screen problem.
  2. 2 Check your brightness settings. While it seems like a simple oversight, the brightness on your laptop may sometimes be turned all the way down. Thus, the screen appears to be black, off or defective, when the problem is simply that the brightness is on its lowest setting. To fix the brightness, check your laptop keyboard. Most laptops have the brightness settings mapped to two keys at the top left of the keyboard, accompanied by a symbol (often a sun). Use these keys to fix your brightness, but keep in mind that some laptops require that you press the Function key at the same time as the Brightness key.
  3. 3 Check the status of your laptop battery itself. There should be a battery indicator on the laptop that is connected to the battery. This indicator is either on the bottom of the laptop or (likely) on the side. If there is no indicator, your battery itself may be the problem, and may require replacing. Keep in mind that older batteries of the nickel-cadmium variety are more likely to decharge over time and forget their initial maximum charge level; this may be a particular issue to users of older laptops.
  4. 4 Find a VGA connector and hook up your laptop to an external monitor if the above steps have not alleviated the blank-screen problem. Turn on the computer and the external monitor. Does the external monitor light up? If so, the blank screen is likely due to a video subset problem/LCD problem in your laptop.

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try hooking up an external video source. Check to see if the computer is actually booting up. if the computer boots up, then the LCD invertor or Backlight of the screen is bad, need to be replaced.

If the computer does not boot up after hooking up an external video source, then most likely your motherboard is bad!


need to be replaced.

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