How to connecttwo external 19" LCD panels over DVI to MBP

Hi,
Is it possible to connect two 19" LCD panels over DVI to a MBP and run them as a single extended desktop?
I've not been able to find an answer in the many posting and I get the impression its possible, but I'm not sure. I get more doubtful when I start to figure out how to do the cabling (daisy-chain the panels, use a DVI splitter?).
Any help is greatly appreciated!
F

Do you use this set-up with multiple monitors and the extended desktop?
I ask because I followed your suggestion but at the Matrox site (http://www.matrox.com/graphics/en/cadgis/products/th2go/th2go.php) all the indications are that it only works with Windows. Even the user handbook doesn't reference Apple at all.
It sounds like a great idea, but I'd like to verify it works before spending the $300.
Francis

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MBP won't connect to external Toshiba LCD, MiniDisplay to DVI to HDMI

Brand new Mac Book Pro, 10.6.4, won't connect to external Toshiba 40" LCD display. I'm using a MiniDisplay to DVI-D adapter coming out of the computer. Then a 10' DVI-D (single link) to HDMI cable running to the display. When I connect the external display the MBP "searches" for a few seconds, but doesn't connect, and the Toshiba display reads: No video signal. This is with the MBP open and display on. BUT, sometimes when the MBP lid is closed, and I connect the display IT WORKS for a about 20 seconds, then the computer "goes to sleep" by itself, and the display shuts off. Strange problem... Also I've tested the computer with a 24" external Planar display (MiniDisplay to DVI-D), and it worked fine. Also the TV and DVI to HDMI setup works fine with my older MBP that has a DVI output. Any ideas...?

The adapter works perfect with other computers (mac pro and dual 24" displays). The problem only seems to happen with this new MBP, Toshiba TV, and the adapter configuration I described. I'm trying to find a friend with a similar new MBP, and try it with theirs. With so many components, it's hard to isolate the problem (especially when all the pieces seem to work properly on their own).

LCD panel problem 2009 13" mbp

Hoping for some insight to what's happening here. My brother's mbp has been having display issues. Initially, he brought it to me with the display totally off but it would cycle through colors when initially turned on but go black once it got into the boot process. I thought it might've been a problem with the lvds cable, but everything *seemed* ok when I looked in. For whatever reason though, just me verifying each connection was secure fixed the problem. Only thing I can figure is that my guess of a bad connection must've been correct.
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So here is the road I have taken so far. I have an old Opti Bay unit that I am no longer using. I pulled the old cable out of the MBP and looked it over, can't see any outside damage (i know this doesn't really mean anything) I placed the HDD in the Opti Bay, hooked everything up and just left the HDD bay empty with the old cable connected to the mainboard. Pushed power and she fired right up like nothing was wrong.
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Twist LCD panel part number

How can I know the LCD panel part number of Twist (Lenov Twist 3347 4HU)?
Do you have any idea?

there are several, apple buys the displays from more than one vendor, is my understanding.
if you need a display panel, ifixit.com & powerbookmedic.com both have them.

T500 WXGA+ LCD Panel Adjustment Challenges

Does anyone have any LCD Panel adjustment tips for a T500 with 1680x1050 screen and Intel 4500HD GPU?I am trying to make adjustments through the Intel Graphic Media Accelerator Driver Control Panel. I am running Vista Home Basic.
A number of different calibration programs such as Calibreze start by having you set the contrast to maximum. When I do this it washes out the screen so I back off on the contrast and try to proceed through the test but the result is that the color saturation is lacking. I am further frustrated by the video settings button on the same control panel. When I change the settings here it appears to have an effect only on the small test photos provided in the adjustment window. It has no effect on the display itself. I found a bunch of color management options in Vista but I have no clue as to where to begin with these. Lastly, I tried to find a user guide for but came up with nothing.Does anyone know where to find one?
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Solved!
Go to Solution.

Hi Doublej,
You don't say what is your purpose in adjusting your screen. If it is to have a truly calibrated monitor for the purpose of photo editing, then I recommend that you just give up on the laptop's screen anyway, and use an external monitor. The external monitor should be of type IPS or MVA or PVA (Wikipedia / Google these if you're not familiar with them) if a flat panel, or a (gasp!) CRT. All of those options are expensive, except the untrendy CRT. Just about every laptop screen these days and most external flat panels too use TN technology, which is great for gaming (fast response time) but utter garbage for viewing angles and color accuracy. Don't believe me? Load up a color photo on your laptop, then try looking at it from slightly above center, slightly below center, left of center, and right of center. See the color and brightness shifts? How can you possibly calibrate that? (You can't -- there's no way to always look at the screen from exactly the same angle, even if you could position your head perfectly, your eyes see different parts of the screen at different angles.) A good external monitor will also give you far better contrast ratio (brightest / darkest areas).
After getting a decent monitor, it's still a good idea to calibrate it. (I've seen some monitors from Dell and Apple come pretty close without calibration, and others that were way out of calibration by default.) The X-Rite i1 Display 2 screen calibrator comes with easy-to-use calibration software for Windows and Mac. (Other calibrators may be just as good but I haven't used them so don't know.)
The FlatPanelsDK Online Monitor Test is great for a quick visual check of your screen's calibration.
One last thing: discrete graphics have NO color calibration advantage over your fine Intel integrated graphics.
Results of Your Ideal Business-Class Laptop survey, concluded 2009-07-29.
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T60p LCD panel died - which kind do I have?

T60p LCD panel died - red screen for 30 seconds at startup then blank.
How do I find out which lcd panel I need for my T60p? Diagonally measures 14 3/16" from corner to corner of the plastic bezel.
Solved!
Go to Solution.

Hi,
What is the 7-digit type/model number and 7-digit product ID on the back of your laptop (so we can confirm that it is a 14.1" model)?
Reddish glow sounds like your backlight is out. If you shine a flashlight into the screen, can you read what's on the screen? If possible, hook your T60p up to an external monitor. If it displays perfectly, then more than likely your system board is fine and it's just the LCD that needs to be replaced.
Any 14.1" 4:3 standard panel from another T60, R60, T61 and a few other models will work. Some are XGA (1024x768 resolution) while others are SXGA+ (1400x1050 high resolution). If you have a T60p it likely came with SXGA+ resolution to match the more advanced ATI graphics processor.
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Here is the Hardware Maintenance Manual for your T60p: http://support.lenovo.com/en_US/detail.page?LegacyDocID=migr-62733
Have a great day. (I do not work for Lenovo)

External display won't work over DVI

I've got an ViewSonic vx2025wm hooked up to my MacBook Pro. It used to work fine over DVI, but some time ago the monitor stopped being able to detect the signal and I had to switch over to VGA (via my Apple DVI-to-VGA adapter). That works fine at the full resolution of the external display, but the image quality leaves something to be desired.
Strangely, the external display works just fine in Windows XP via Boot Camp. Oh, the irony!
Any ideas on how to get this working again? I dread the OS X re-install.

Same problem here. Had a Dell 30" monitor plugged in for a long time. Suddenly stopped working yesterday. The symptoms: the Mac detects the external display and "thinks" it's got it there (I can tell because the active content of the window is gone on the laptop's screen), but the display does not successfully see the output from the Mac (it shines its orange "no signal" light).
Restarting does not seem to help.
I should test it with a new display cable, but am a little reluctant to do this, as the dual link DVI cables required for this monitor are so expensive, and because previous posters on this topic have tried swapping cables with no result.

How can I display the front panel of the dinamically loaded VI on the cliente computer, the VI dinamically loaded contains files, I want to see the files that the server machine has, in the client machine

I can successfully view and control a VI remotly. However, the remote VI dinamically loads another VI, this VI loaded dinamically is a VI that allows open others VIs, I want to see the files that contains the server machine, in the client machine, but the front panel of the dinamic VI appears only on the server and not on the client, How can I display the fron panel with the files of the server machine of the dinamically loaded VI on the client computer?
Attachments:
micliente.llb ‏183 KB
miservidor.llb ‏186 KB
rdsubvis.llb ‏214 KB

I down loaded your files but could use some instructions on what needs run.
It seems that you are so close yet so far. You need to get the data on the server machine over to the client. I generally do this by doing a call by reference (on the client machine) of a VI that is served by the server. THe VI that executes on the server should pass the data you want to diplay via one of its output terminals. You can simply wire from this terminal (back on the client again) to an indicator of your choosing.
Now theorectically, I do not think that there is anything that prevents use from getting the control refnum of the actual indicator (on the server) of the indicator that has the data, and read its "Value" using a property node. I have never tried this idea but it seems t
hat all of the parts are there. You will need to know the name of the VI that holds the data as well as the indicator's name. You will also have to serve all VI's. This is not a good idea.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
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How do I repair the LCD backlight?

I'm in the middle of a fiasco with my iMac (read all about it here: http://discussions.apple.com/thread.jspa?threadID=822352&tstart=0). Basically I sent the computer off for repair of the power supply and got it back with a non-functioning LCD.
So it appears that the backlight is out. Using a flashlight at an angle, I can see the entire screen image (my desktop and all the icons). In normal light the screen looks black.
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I would like to fix this myself if I can be sure of the problem. I live 100 miles away from an Apple service center, so I would have to UPS it to them. CompUSA, which did the power supply repair, said I would need a whole new LCD panel for $750. He actually said that he didn't know what was wrong with it, and he would have to start replacing parts at my expense until he found what worked. The LCD panel was to be the first try (after a free power supply and logic board from the repair extension program).

I found the problem and repaired it myself. The inverter was bad, and I found a used one on ebay for $39. The computer is not in warranty.
Apple Tech support and the Apple Stores both said that for iMacs, they do NOT accept shipments and require in-person, carry-in service to Apple Stores. Third-party service centers (e.g. CompUSA) may allow mail-in service.
I'm going to get Apple Care with my next iMac, but I don't like the fact that I will have to get service from an "authorized" third-party service center that honors Apple warranties (e.g. CompUSA). I would prefer Apple service, but 4+ hour drives each way are out of the question.

How can I edit lightroom 5 smart previews on mac book pro (mbp) when the lightroom 5 master image files are on my external hard drive is disconnected from the mbp

How can I edit lightroom 5 smart previews on mac book pro (mbp) when the lightroom 5 master image files are on my external hard drive is disconnected from the mbp? So far when I try to disconnect the external HD from the mbp, I get the following pop up window: The disk "external hard drive A" couldn't be ejected because "Lightroom" is using it. Quit that application and try to eject this disk again. When I do that and restart Lightroom 5, the Adobe Photoshop Lightroom - Select Catalog screen pops up but doesn't list my external hard drive A as a choice.
I've reviewed Adobe's Lightroom Help | Smart Previews Lightroom 5 web page and still haven't been able to figure what I'm doing wrong. Any help would be appreciated.

Your internal HDD. by default, is named 'Macintosh HD'. From what information you supplied, it looks like there is already a Lightroom catalog installed on you local (internal) HDD using the standard naming convention Adobe uses as well as a Lightroom catalog on your external drive which you created. To be sure of which catalog Lightroom is loading when it starts up, To do this, start Lightroom as you normally would. After it starts, select the Lightroom menu item, then select the Catalog Preferences item and finally, navigate to the General tab. The Location information will tell you exactly what catalog Lightroom is opening by default. This will likely be the Photography Mac Book Pro Versions catalog on your external HDD. Once that is confirmed, you are ready to proceed. As an additional test/verification, you can shut down Lightroom and, this time, start Lightroom while holding down the ALT/OPTION key. This will cause Lightroom to pause and display a screen which will allow you to chose a different catalog to open. Navigate to the /Users/[user name]/Pictures/Lightroom folder and select the Lightroom 5 Catalog.lrcat file. When Lightroom comes up, there should be no previews or folders as this catalog should be empty. Now you can be certain which catalog is being used and which catalog has all your data and you are ready to migrate your current catalog. Shut down Lightroom.
To migrate your current catalog, use Finder to locate your Photography Mac Book Pro Versions folder on your external drive. Select the folder and select COPY from the context menu. Next, use Finder to navigate to the /Users/[user name]/Pictures/Lightroom folder on you internal HDD. You can start at the Macintosh HD level and work your way down by opening each level (Macintosh HD/Users/[user name]/Pictures). Select the /Pictures folder and then select PASTE... from the context menu. When the COPY/PASTE is complete, you should see the following files on the Macintosh HD:
Macintosh HD/Users/[user name]/Pictures/Lightroom/ and
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The Macintosh HD/Users/[user name]/Pictures/Lightroom folder will contain the empty default catalog the Adobe created when Lightroom was installed and Macintosh HD/Users/[user name]/Pictures/Photography Mac Book Pro Versions will contain a copy of the catalog you created on your external HDD.
You are almost done now. Make sure your external drive is still attached for this step. Restart Lightroom using the ALT/OPTION key again. When the Select Catalog screen appears, select the Choose a Different Catalog button (lower left side). When you do, a Finder window will open to allow you to navigate to a catalog of your choosing. Navigate to Macintosh HD/Users/[user name]/Pictures/Photography Mac Book Pro Versions and select the file Photography Mac Book Pro Version.lrcat. This is the copy you just created. Select the Open button and Lightroom should start. You should see all of your previews and settings just as before. Also, in the left hand panel, all of your folder should show up and none of them should be dimmed and none of your previews should display a small exclamation point badge. Either a dimmed folder name or an exclamation point badge indicates that Lightroom can't find the associated image file. If everything looks good, go to the Lightroom menu, select Preferences and then select the General tab. Under Default Catalog, select an option to either load the LAST catalog opened or select the Users/[user name]/Pictures/Photography Mac Book Pro Versions catalog from the drop down. Shut down Lightroom and then restart it normally. This time, when Lightroom starts, you should be viewing the new copy of your catalog. You can confirm this by looking at the General tab on the Catalog Preferences screen (Lightroom/Catalog Preferences menu items). Shut down Lightroom once again and this time, eject your external drive before restarting. This time, your folders in the left hand panel will be dimmed but you should be able to work with your smart previews. If Lightroom should display a Select Catalog screen with the external drive detached, double check your settings as it indicates Lightroom is still looking at the copy of the catalog on the external drive rather than the new copy you made.
Finally, if you are seeing dimmed folders and/or exclamation point badges with the external drive attached, this indicates a problem. You can select any folder and select Update Folder Location from the context menu. This will allow you to navigate to the copy on the external drive and select it. Lightroom will then update the catalog (select to synchronize the content). This will not only clear the dimmed folder problem but also remove the exclamation point badges for all photos in that missing folder. However, it may indicate that not all went well with the copy of the catalog so make sure to verify all went well. You can use the Get Info option on the two folders. You should see the same number of files/folders for both the copy on the internal drive as well as on the external drive but you can't rely on the byte count because of the possibility of differences between the geometry of the two drives. Hope this all helps!

How to switch off the LCD on Satellite L655-1JV?

Hello!
I have a *Toshiba Satellite L655-1jJV*, and I would like to know how can I *switch the LCD off*. I've tried to use the F5 key, but it doesn't give me the option to change (always the LCD on unless I connect an external monitor .
Of course, I mean, switch the lcd off while, for example, I got the monitor up, and I'm listening to music...
I'm really looking for the answer!

In users manuals document is clearly described when you should use FN+F5 key combination and it has nothing to do with switching LCD off.
If you dont need display and it should be OFF while you are listening music please change display settings in power options. In power settings there is option Turn off the display. Set it to 1 minute and everything will be OK.

What's the latest Jan. 2010 spec LCD panel model #? (e.g. 9CBD, 9CA0, etc.)

Just wondering if anyone who has a 2010 assembled 13" MBP or recently warrantied MBP can confirm the latest Apple display spec model # (e.g. My MBP was built in Sept.09 and has a 9CBD panel) that is being used?
Got the dreaded light leak developing on the side and hinge edges of my MBP -- but considering that my colours/calibration are pretty much bang on for my eyes as well as the fact that I've painstakingly applied an Anti-Glare film 100% free of lint bubbles LOL -- my conundrum if the latest spec'd panels are really any better or if it's still a lottery on whether you get a good panel if replaced under warranty. The last thing I want is to go backwards in quality!
Also if you've gone through the warranty process I'm curious on whether you have any say on whether it is another 9CBD that goes in or if you can specify to them that you're only satisfied if a Jan. 2010 9CA0 (or whatever # it is) is put in?
I am planning to wait to see if Apple quietly updates the LCD panels in the MBP line at the Jan. 27 iTablet/iPhone OS4.0 event before taking it in anyways, but hopefully someone can shed some light into how Apple have been going about dealing with the light leak issues. Thanks again.

Thanks for your kind cmments matrixxzero. I agree rockykoston I will replace my keyboard eventually myself too, with all the stories here I'm terrified to hand my laptop into service, apart from not having the spare time, Idon't want it to come back scatched, damaged and/or unfixed. That doesn't augur well for Lenovo guarantees. I am fully cpable of servicing it myself but many customers aren't and shouldn't have to.
As I say the other issue is model lines. Our Chinese friends have proven they can maintain quality and innovate now but their shere manufacturing muscle means it's all too easy to have too many models and too many variants with too much crossover.
Why drop a great design like the Z710, only let down by a middling to poor Nvidia chip and introduce new 17.3" models with absolutely no maintenance covers and sealed batteries!! They should have upped the Nvidia chip (the same as the Y50) and a better WLAN card. Same with the 15.6" models - evolve the Z510 to have a case like the Z50 but the same or better components again. Similarly the Y50 should have been an evolution of the Y510 not a step down.
Lenovo has definitely gone cheap in the upper end of the consumer range, when they needn't as there are tons of cheap laptops from the brand.
Most of the reviews I came across for the Z510 described it as having very good build quality and since I changed laptops three times from the same store within my purchase period I had chance to compare closely, with at least Toshiba and Acer. I would not agree with these reviews it's OK but not great. The metal upper case fooled me a bit but it's less sturdy than a cheap i3 HP laptop it replaced. Again for around a $1000 it should be better.

Some LCD panel info

Hello all,
Like quite a few people on this forum, I recently purchased a new MB 13" aluminum and have been very disappointed in the quality of the LCD panel. In particular, I feel like the viewing angle on this display is significantly worse than my old Thinkpad X41 tablet, which is going on 4 years old. So, I went in search of some technical information, which I figured I would share...
There are three main technologies for TFT (thin-film transistor, or "active matrix") LCD panels. Twisted Nematic (TN) is the most popular type of panel because it's cheap to manufacture and has very fast response times. However, image quality on the TN panels is the worst of the three technologies. In Plane Switching (IPS, S-IPS) is the best quality panel, but is expensive to manufacture and has relatively slow response times. Vertical Alignment (VA, PVA, MVA) is a mid-range technology, somewhere between the cost of TN and quality of IPS.
This site provides a very nice explanation of the pros and cons of the three technologies:
http://www.pchardwarehelp.com/guides/lcd-panel-types.php
The vast majority of displays (notebooks and desktops) use TN panels because it keeps costs down and because the fast response times are better for games and movies. This trend was probably reinforced by the explosion of LCD televisions: for TVs, good response time is critical and vertical viewing angle is totally irrelevant.
There seems to be a consensus that all three lines of MacBooks use TN panels, but possibly with different levels of quality. I could not find much information on what causes quality to vary between panels that use the same technology (i.e., why is one TN panel better than another.)
Most IPS panels go into high-end displays, such as the Apple 30" Cinema display, for applications where image quality is crucial. It turns out -- and I did not know this at the time -- my old Thinkpad X41 is one of the few notebooks ever made with an IPS panel. I suspect they chose this panel because a tablet PC must be reasonably readable from a wide variety of angles (for example, laying flat on a desk), or it's useless.
So, maybe we just have to wait for a MacBook Tablet...Jobs, are you reading this?

SZGuy, nice digest of LCD info. You had me with every point except the one about viewing angle being irrelevant on a television. How so? When a family sits distributed around a room, all are entitled to a good view of the telly.
Every TV of at least 32" or larger uses a wide viewing angle technology panel. IPS and PVA are still hugely important in television and I don't see that changing soon. In fact, it is TN that is irrelevant in the world of TV.

MegaPC 180 - Programming LCD Panel

Hi All,
I recently built my MegaPC180 and what a lovely machine she is too!. My old machine sounded like an aircraft taking off!, this is nice and quiet with lots of mod-cons in a SFF barebone.
One thing I'd like to take advantage of is the LCD panel at the front. I know the PCAlert tool uses this, and by the looks of things it doesn't make any direct calls to the dll file which I thought may be the API for the panel.
I'm very familiar with C++ and VB and want to use the panel in several utilities I've created.
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DIF_GetVideoFormat
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DIF_RD_GetRemtKey
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DIF_RD_RMute
DIF_RD_RadioOff
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DIF_RD_SetEQ
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DIF_TV_AudioOn
DIF_TV_FineTune
DIF_TV_GetFreeScanStatus
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DIF_TV_SetCountryCode
The unfortunate thing is....I don't know the syntax of the functions, such as params, and returns.
I'm hoping someone from these forums, or from MSI technical could tell me the declarations so I can get over this hurdle?

Hi Andy,
Perhaps you have already read the posts regarding control of the LED panel. Anyway, I have done a little research myself and was able to obtain the specifications of the Bluebird VL+ controller which actually controls all the pc-off functions (and the LED panel). In theory this controller can perform more tasks than MSI used!
I also contacted Liteon Optoelectronics for the design specifications of the MSI LED panel. Unfortunately they are not allowed to release them (prohibited by MSI). However, I found the blueprints of another LED panel from Liteon with a comparable product code. I think it is likely that Liteon used the same design basics when building the MSI panel.
You can send a p-mail when you are interested in these .pdf files.

HT3988 how to connect external keyboard to the garage band if its possible

how to connect external keyboard to the garage band if its possible,
is any body tried ? I have roland e66 keyboard and im trying to
connect with grage band but i dont know thats is possible??

You can definitely just connect a mouse and keyboard and then an external monitor and it will work. In the power options in the Windows control panel you will have a choice as to what happens when the lid is closed. Set it to "do nothing" and then you can shut the lid of the laptop and use only the external monitor.
If this is "the Answer" please click "Accept as Solution" to help others find it.

How to connecttwo external 19" LCD panels over DVI to MBP

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