Question about Dell Inspiron 6400 Notebook

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Replaced LCD Inverter, now screen comes on and bright but choppy

I have a Dell Inspiron 6400. The screen went blank. I hooked it up to an external monitor and a diagnostics test, claiming that the LCD inverter was bad. I replaced the LCD inverter, and the screen came on just fine, no problems. But after being on for a while, the screen started shaking and different colored lines strewn across the screen. Its all jumbled up. Now, it will only turn on every once in a while, work fine for a few minutes, get all screwey and then go black. Is the new LCD Inverter bad? or is something else the problem now?

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Does the external monitor display a normal image?
If the images is OK then the video card is OK.
The inverter supplies high voltage to the CCFL lamp which provides the backlighing and does not jumble the colors on the screen. If you get a pinkish hue or a flashing screen then this would indicate
the CCFL lamp is faulty.
From the description of the fault, it indicates that the fault could be a faulty video cable or video connector. Try reseating the video cable/connector on the motherboard.

Posted on Jul 20, 2009

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http://support.dell.com/support/topics/global.aspx/support/dsn/document?c=us&cs=04&l=en&s=bsd&dn=1092705

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This could be a faulty video cable or connector or CCFL lamp or inverter.
Try reseating the video cable/connector that connects to the motherboard first.
If this doesn't work then to determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
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Check out
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Check out http://www.ccfldirect.com. they have a wide variety of inverters and backlight tubes for LCD panels and laptops. I'd change out the tubes at the same time you replace the inverter. The cost is minimal, and will increase the likelihood that you'll be successful

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Hi there.
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Good luck and thanks for using Fixya!!

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this sounds like a classic case of inverter problems, it could be just inverter coil thats gone which is an inexpensive repair, if it is the inverter then its a bit more.
try the Fn the F key that shows two tv screen icons, it may just have switched to external mode by accident

good luck

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