Question about Compaq Presario 700 470024-192 Notebook

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My wife's compaq presario f700 turns on yet the screen is really dim to the point of almost being all black! I can see some things with some strain or added light. Please advise.

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Screen backlight is probably failing, the fact that you are getting an image suggests that the inverter is ok (although replacement is often the only way of telling).

Firstly, plug the laptop into an external monitor, if the picture is clear, this will confirm that the issue lies with the backlight or the inverter, if however it does not, then you may have issues with the onboard graphics chip beginning to fail (expensive as it will need a new motherboard).

The only other cause can be a damaged VGA lead (unlikely).

Best guess would be that the laptop screen needs replacing, as replacing the tube for the backlight is a very difficult task and not really worth the effort or expense. You can find some good 2nd hand screens now for a 15.4 laptop quite cheaply and replacement is very easy

Posted on May 29, 2011

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Hope this helps:

http://www.laptoprepair101.com/laptop/2009/05/04/how-test-lcd-screen-inverter-in-laptop/

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Blank (dark) screen


If you can still see a faint image on the screen, then its the inverter coil or the inverter itself which has gone bad or maybe even worked itself loose causing a bad connection.
Either way you will have to take it to PC repair shop to be looked at.

Good luck and thanks for using Fixya!

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