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No video on the LCD

Hello,

Im from Chile and bought a Dell XPS1530 with 8400GS as the video chip, it worked for like... 1 month until it didnt show image over the buil-in LCD of the Laptop.

Here is what i did, just to know about some problems with the microfracture of the soldering material, but looks like this isnt the case. The Laptop works great if i attach an External Monitor over the VGA port.

Did _shot_ de videochip with a heatgun and press it against the motherboard, but it still have the same issue, no video on the LCD but it does over the VGA port.

A week after that a friend of mine borrowed his XPS 1530 to see if the faulty part was the LCD, but it wasnt, my LCD panel [cable and everything] worked fine on his XPS, and his LCD panel [which is working] didnt show anything attached to my XPS.

No idea what to do next and no, i dont have warranty anymore, if someone have a clue of how to fix this would made my day, week and probably year.

Thanks in advance from Chile.

Answered! View the answer I have this problem too

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+1 for excellent and brave troubleshooting with the LCD panel.

? If the VGA port is working, isn't the 8400GS video chip working also?

It could be a cold solder joint, not microfracture for the LCD outputs of the 8400GS or the LCD main board connector. This might not show.

Sorry you are having this hassle, keep posting what you learn. This is an interesting problem.

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A friend of mine had a similar problem with her laptop. It's the power supply on the video card that powers the inverter. The one in her laptop was replaceable, but I'm not sure about your model. Also, they are not inexpensive.

A lot of those older XPS laptops tend to have issues with heating as well.

You do have a few options though. First, external monitor for everything. Not great, but if you have one, you can at least use the laptop. Second, call Dell and get a price on a new video card. The cases are usually pretty trivial to open to replace it, if that laptop does indeed have a replaceable card. You might even try getting in touch with nvidia to see if they can do anything for you. The last options would be looking for something on eBay, Craigslist or local PC shops.

This is a known issue and there was a lawsuit filed against nvidia about two years ago. I'm not sure of the outcome.

From the Wikipedia article:

"Some chips of the GeForce 8 series (concretely those from the G84 and G86 series) may suffer from an overheating problem. NVIDIA states this issue should not affect many chips, whereas others assert that all of the chips in these series are potentially affected. NVIDIA CEO Jen-Hsun Huang and CFO Marvin Burkett were involved in a lawsuit filed on September 9, 2008 alleging that their knowledge of the flaw, and their intent to hide it, resulted in NVIDIA losing 31% on the stock markets.

The reason for the high failure rate was because of faulty solder material; when the GPU heated up and then cooled over its use, particularly when used in GPU intensive operations like games, the solder would become soft when hot, and when cool, that solder would crack, causing failure in the 8600M GT, 8600M GS, 8400M GT, and 8400M GS cards. It is widely acknowledged that these cards have a universal design flaw. It has also been speculated that mobile cards prior to the GeForce 8M series like the GeForce Go 7600 and earlier also have this design flaw, although it has not been proven."

I wish you luck!

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The power supply for the inverter is on the video card. :o(

You have already tested the inverter for the fluorescent panel when you hooked your monitor to your friend's computer. The physical inverter is located just under the LCD panel. When it's working, you can feel that area gets warm...

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Thanks for your reply, where's locate the power supply for the inverter?, never heard of something like that, AFAIK the one who lights up with energy the LCD panel is the inverter itself.

Thanks in advance.

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I hadthe same problemen with a sepaperate double video card in my dell Xps m1730

Finale a had the two gpu reflowed and if it happend again then the gpu will be reballed

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