Trying to upgrade Toshiba NB550D screen from WSVGA to WXGA

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carnbot

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Hi,

I'm trying to upgrade the screen of my Toshiba NB550D to work with windows 8 and because the higher resolution works well with this netbook. I bought an equivalent LG 10.1 LED WXGA screen but there is noise in some areas of the some colours, I'm trying to work out if the screen is faulty or it's incompatible?

I know some people have successfully upgrade the NB500 series screens but I'm not sure about not this particular model. Other than the colour glitch the screen works really well and is crisp and smooth.

I don't want to have to go back to WSVGA, why did Toshiba not use a 1366x768 screen with this netbook?
The graphics card can handle HD so it should be ok yes?

The colour noise is in the Bios screen so it can't be a video driver issue I assume....

Thanks for any help
 
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carnbot

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Hi,

Yes it boots up and Windows 8 works really well except it has fuzzy noise and lines in certain colours, not all though.
Windows itself detects no problem with the screen.

here are some closeups:



2_zps1bc95a55.jpg


3_zps4f0977f5.jpg
 
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carnbot

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I'm hoping that it's because it's a faulty screen. The supplier is letting me return it. But I will get another one from somewhere else.
I'm just wondering if an WXGA screen is incompatible with this netbook would it have errors like this?
 
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carnbot

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Thanks, hopefully someone else can also confirm that these colour errors are the result of a faulty screen and not because it's incompatible.

I don't really want to get another one ordered if it won't work because of something to do with the netbook :)
 
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carnbot

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You CANNOT just upgrade the screen like that
Click to expand...

Hi Brett, can you say why without a flat statement?

I know on most netbook models you can't. According to this thread you can on my series of netbook http://forum.notebookreview.com/hardware-components-aftermarket-upgrades/647314-possible-upgrade-netbooks-screen.html

So it has been done on this series of netbooks. I don't know how the hardware works, if it has a graphics card that supports it and a monitor connection which is compatible is there something else hard wired to the motherboard which prevents it?

So if it doesn't work what exactly is causing the color band issues? I'm searching for a definite hardware reason other than you simply "cannot" do it as others have.

thanks
 
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Brett928S2

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Hi :)

Look at my sig...that's why...

99% of lappies NEED the correct screen...easy way to test yours ...put in the CORRECT NEW SCREEN (numbers same) and if it works perfectly, you will know i am right...

All the best Brett :)
 
getochkn

getochkn

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The rare time it does work is usually when they either use the same hardware for multiple laptops or they offered the laptop itself with different resolution screens. IE, a model that lets you get a 15" 1600x or 1920x screen at checkout, the 1920x screen would probably work because the company isn't changing anything other than a different panel. In reality though, most laptops don't do that.

Yes it worked for 1 person who said so on a forum. The majority of laptops though, it won't. It's hard to say if it's a panel issue or incompatible with your laptop.
 
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carnbot

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Hi Brett,

Of course I am aware of this :) I wouldn't have tried to upgrade the screen without the knowledge that several other people have successfully done so with this model.

It turns out that the screen connector is damaged and this might be causing the issue. I was careful, but not careful enough obviously as when I peeled the tape back it bent some of the connector slightly.

The original screen is no longer working by my connector. How easy is it to replace a screen connector?
I can still connect to an external monitor via hdmi on the netbook So I know this connector is the problem.


thanks
 
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carnbot

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Well it turns out it's not particularly easy but not too difficult on most laptops so hopefully this one is the same. I've found the lcd cable part online. That seems the only option at this point unless I can somehow fix the connector.
 
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carnbot

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I'm not sure if that's what it's called but it's very flimsy so I'm just ordering another instead of even trying, they're quite inexpensive anyway....
 
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Wrathlon69

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Just thought I'd chime in here:

The mod works for sure on an NB500 and according to EMPR (tosh.empr.com.au) the part numbers for the NB500 LCD Panels are identical to the part numbers for the NB550D LCD Panels. Any screen mod that works with the NB500 will also definitely work with an NB550D.
 
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carnbot

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Thanks :) that's good to know, I must have damaged the connector when I peeled the tape back which caused the slight colour error, otherwise it was working great.
 
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Wrathlon69

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This has inspired me so I just bought myself a 1366x768 panel and decided to take it a step further with a capacitive touchscreen overlay :D
 
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Wrathlon69

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OK mine arrived, I have the similar screen crap going on but its on everything.

When I plug the original screen in, it works fine.

Considering the guy in that thread did it with a laptop that shares the exact same panels Id really love to know why its having issues.
 
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carnbot

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I'm still waiting for my LCD cable to arrive. Did you double check that the screen was attached properly?
Is it an LG screen like the original?
This is a setback as we can't confirm if anyone has managed to upgrade this model yet.
 
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Wrathlon69

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I double, triple and quadruple checked. I'm confident I know exactly what the problem is:

In the older NB500 series it has a low level hardware control to initialise the screen properly at 1366x768 whereas our model doesnt. All is not lost however, as this means its purely a signal output problem.

Evidence pointing to this:

1) I found a thread of a guy who was replacing the LP101WSA screen (Our factory panel) with a LP101WH1 (The panel we are trying to use) in a different laptop. One person solved it by extracting the graphics module from the BIOS of a different laptop and imported it into the BIOS for his laptop and got it going as it now contained the profile needed to run that panel correctly.

2) In another thread, a guy doing the same thing managed to resolve the problem by compiling a new intel graphics driver with custom signal settings to override the defaults. This made the panel work perfectly in Windows but didnt resolve the issues outside of windows obviously as its a driver fix. This doesnt matter as the signal, although bad, is more than adequate for BIOS and setup, etc.

The first finding points to it being a BIOS limitation, the second points to that limitation being able to be compensated for in the graphics driver.

I actually have some experience in this - my desktop runs a Radeon 5970 and I use an old FW900 24" Widescreen CRT. The problem is ATi drivers cant custom res simply like nVidia ones can and the monitor supports well beyond its official resolutions. I made a custom monitor INF that overrides the EDID detection and tells the graphic card specifically what signal to output and it works. I have a monitor that officially supports 2304x1440@60hz outputting 2560x1600@72hz.

I tried the same trick on the netbook with the new panel and it seems the 6250/6290 accepts this override just fine as I went from bad signal to no signal at all but still had backlight control indicating the panel was just out of range. When I plugged the default panel it, it tried to draw 1366x768 but cut it off because the panel isnt that big and it had a green artifact at the bottom meaning that it did, in fact, modify the graphics card output.

I have documentation of both panels with their signalling info and they are VERY different panels, hence why it doesnt work properly. Given what I've found, what others have solved with and from my limited testing so far, I should be able to make a custom driver to enable the panel to work correctly just need a bit of time to play around and experiment.

Dont lose hope just yet because I'm about 90% confident I can fix this.
 
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Wrathlon69

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Well bad news unfortunately. Ive tested every single combination of everything in both Windows and in Linux with custom outputs etc and its always the same.

There must just be some slight difference between the LVDS controller on these boards and the one on the older NB500 that lets the older one use the panels.
 
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Brett928S2

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Hi :)

Sorry but I did tell you...we change hundreds of screens a month....

All the best Brett :)
 
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