Vaio VGN-NS230E Video Blip

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Vaio VGN-NS230E Video Blip

Postby TriAngle » Tue Oct 29, 2013 2:18 pm

I bought this Vaio from a friend (original owner) about 6 months ago.
I noticed that when I would boot it up, the LCD screen would cut-out for a split second, then everything would be fine.
Well, I had it running for the past week, and I decided to use it, so I opened the lid and the LCD screen is going beserk.

The top 1.5" of the screen is normal, with the remainder of the screen always blurry and going erratic every 3 seconds or so.

It could be the video card, video cable, LCD inverter, and/or the LCD screen.
I reseated the video cable & the inverter, same problem.

Plugging the laptop up to an external screen via VGA plug, it works fine, but I know this is an analog output, whereas the mobo GPU is digital.

Does anyone have any suggestions?
Thank you for your assistance.
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Postby TriAngle » Tue Oct 29, 2013 2:26 pm

Sony Vaio VGN-NS230E

Video/Photo link here
http://s857.photobucket.com/user/Joe2Sh ... t=3&page=1
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Postby Karlsweldt » Tue Oct 29, 2013 2:38 pm

Fairly decent model, from searching its type. All laptops have a problem.. cooling! If the air ducts are clogged, then temps can be higher than desired, causing premature failure of components.
If you have great video output to a regular monitor, consider either the LCD screen itself or the video driver chip is failing.
If the laptop screen itself, not too difficult to replace. But if the driver chip, best to get another main board.
If you feel confident in "surgery" on the unit, check that there is no charred marks on any chipsets, and that all air ducts and the fan are free of debris. Also, check any heatsinks to ensure they are properly mounted.
From your description of the screen image, likely the matrix driver chip in the LCD panel itself is having problems. If the laptop were left too long in a hot, sunny area, heat damage could occur to the screen components.
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Postby TriAngle » Tue Oct 29, 2013 2:53 pm

Karlsweldt,
Thank you for your reply and research.

The internals of the laptop are squeaky clean, as 4 months ago I upgraded these items: MS Win7 HP 64-bit OS, CPU, HDD, RAM, Keyboard

Seagate Momentus ST9750420AS 750GB 7200RPM 16MB-Cache SATA HDD
Crucial 2GB DDR2-PC2-6400 CL=6 Unbuffered NON-ECC DDR2-800 800MHz 200-pin SODIMM RAM
Intel Pentium Core2Duo (Penryn) T9300 2.5GHz 64-bit SLAYY
LotFancy Keyboard Black

Northbridge: Intel GL40 rev. 07 (Intel® 82GL40 Graphics and Memory Controller Hub)

MEMORY: 4GB (2x2GB SODIMM)

GPU/GRAPHICS: Mobile Intel 4 Series Express Chipset GMA 4500M GMA, 4500MHD 400MHz, 128MB-Dedicated Memory, Dynamic Video Memory Technology 5.0
Intel GMA 4500M with Intel® Clear Video Technology . 1320MB dynamically allocated shared graphics memory

LCD: SONY 15.4" 1280x800 16:10 WXGA Widescreen XBRITE-ECO technology, Glossy Active Matrix-TFT CCFL 30-Pins LCD Screen
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Postby TriAngle » Tue Oct 29, 2013 2:58 pm

Karlsweldt,
The laptop is in a shaded, cool room, but, the lid was closed for a week (7 days or more) and when the lid is closed, it does not "sleep" or "hibernate", it runs full blast.
So, probably there was a heat build-up causing the LCD screen to overheat, causing these problems.
Did you take a look at the video link on Photobucket?
The top 1.5" of the screen is perfect, but fubar elsewhere, so I'm thinking the video chip on the mobo is good, and the LCD screen is kaputz.
What do you think?

The wife was using this laptop, but left it unattended for that week and used one of her others, but she left it on.

Thanks again.
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Postby Copper » Tue Oct 29, 2013 6:24 pm

hook it up to a monitor and if its ok on a monitor, then the LCD inverter is the problem
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Postby TriAngle » Wed Oct 30, 2013 5:33 am

Copper,
"Plugging the laptop up to an external screen via VGA plug, it works fine, but I know this is an analog output, whereas the mobo GPU is digital."

I replaced an LCD screen recently on another laptop that was defective. Hooking the laptop up to an external screen it worked fine via the VGA plug.
After replacing the LCD screen, the laptop worked fine, as the inverter was not the problem.

My question is, how do I know the inverter is bad?


Thanks for your help.
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Postby TriAngle » Wed Oct 30, 2013 5:53 am

I ordered an inverter. We'll see if that's the problem.

Thanks again.
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Postby Karlsweldt » Wed Oct 30, 2013 6:36 am

The wife was using this laptop, but left it unattended for that week and used one of her others, but she left it on.

Hmm.. a common event with today's hectic life styles!

The signal from the video processor is digital in unaltered form straight to the LCD screen's matrix driver. No conversions.
An 'inverter' for video display on monitors only provides a high voltage for the slim fluorescent lamps that light the screen. Typically a 65 volt to 120 volt output. Usually a plug-in feature with laptops, but can be hard-mounted on some. But this would not cause screen image distortion! The matrix driver in the LCD panel itself has to address a grid of horizontal and vertical bus lines to provide the desired image. Consider this 'grid' to be like a window screen.. where each line intersects, a voltage activates the RGB pixel elements. If the matrix driver chip goes bad, it cannot address the hundreds of thousands of intersecting points correctly. Only by replacing the screen pack itself, can you get it back to original.
When closing the lid on an active laptop, it should go into "sleep" mode.. and become partially inactive, save for memory retention. If not, then the pressure button to activate the feature may not be working properly or the software driver is incorrect for the OS and unit use.
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Postby evasive » Wed Oct 30, 2013 7:20 am

TriAngle wrote:I ordered an inverter. We'll see if that's the problem.

Thanks again.
Tri.


As that is the cheapest option at this moment. Good thinking. But seeing only part of the screen is going completely haywire, I fear it's the screen itself...

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