Question about Compaq Presario R3000 Notebook

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I turn on the computer but the screen is not displaying anything or if it show something I still can not see. The screen remain black.

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Thats the inverter-board... a little thing, that starts the backgound lights... something like $75,00.

Posted on Mar 07, 2009

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Does it sound like the laptop booted up except the screen is black? Do you hear the fan running and the hard drive spinning? If so try the steps below.
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.

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1. take a flashlight and light on the display after you started the computer and waited for about 5 minutes, if you can see the windows environment the inverter needs to be replaced (normally it's in the display frame under the display)
2. attach an external monitor to the laptop and boot. if the monitor shows something you don't have a defective graphic-card (maybe you must push fn + one of the fn-buttons showing a monitor)

if you don't get anything displayd by an external monitor the graphic-card might be defective - you would need a "new" motherboard then

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Black uses much less power. It's a device for automation, so you really should not lavish the watts and attention on it unless it has to perform something truly novel.

If you really want to use the monitor though, you can use the function-key combination used to switch the display between internal and external displays.

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I've had a similar problem with my 173v monitor since I bought it a few years ago. When I start my computer, Mac or PC (I've connected it to both), the screen remains black and the green power light flickers once a second, almost like it's twitching - it's different from the blink it makes when the computer isn't turned on but the monitor is. Like kronem, I have to unplug the line from the monitor to the computer, wait for the monitor to register no input, and then plug the monitor in again before it displays anything. I've never figured out a way around the problem - I hate it!

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