Why T430 mini DisplayPort is so unstable?

I have a T430 and I bought a mini DisplayPort to HDMI adaptor, then I connect this adaptar with HDMI cable to a external display. (T430-> adaptor -> HDMI cable -> external display)
In most cases, the video displayed in the external display well. But sometimes, the video in external display disappears suddenly, then external display shows "no signal". It seems the connection is lost and I can't found the external display in my T430.
Even worse is in this case, it is not that easy to get the connection back. The only rule I conclude until now is, it looks like I need to make the laptop sleep then wake it up, Then after a while, it seems the external display can be found again and the video will be able to display.
Does there anyone confront similar problem as I described? Any suggestion to fix?
Connecting the external display with T430 is very annoying!!!!!!!
There is ground noise problem in VGA port, I have to use Mini DisplayPort, but the Mini DisplayPort is unstable.
Moderator comment: Please refrain from bumping your thread(s) / post(s) more frequently than 3 days. Doing so, unfairly, pushes other members' threads downwards. Bumping post(s) removed.

Try new adapter and/or miniDP cable.
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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T430 1600x900 i5 Core: Mini DisplayPort To HDMI 1920x1080 TV Resolution And Sizing-Overscan Problems

Hello, and thanks in advance for any help. Also, my apologies if these issues have been previously resolved; I've spent 2 days searching for answers and none of my effort has resulted in a solution, either here or elsewhere.
I very recently for the first time connected my ThinkPad T430 2344-5GU (i5 core, native screen resolution 1600x900, Intel HD 4000 v9.17.10.2843, NVIDIA Optimus NVS 5400M v9.18.13.1100) to a Panasonic HD TV (native screen resolution 1920x1080) using a Mini DisplayPort to HDMI connector, with the hope of playing 1080p movies on my laptop while watching them on the TV. This seemingly worked fine at first--both audio and video were present--but I quickly noticed that the image on the TV was, very slightly, larger than the image on the laptop screen (cutting off roughly 5% of the image on each of the 4 sides) and that the resolution wasn't 1920x1080. So I hunted for a solution.
Windows display properties were no help. In fact, as soon as I tweaked something there I lost the picture on the TV (the options available are "Show desktop only on 1" (the laptop screen), "Show desktop only on 2" (the TV screen), and "Extend these screens", which annoyingly turns the TV blank yet allows the cursor to to enter the TV screen depending on the chosen layout and the cursor's approach direction to the TV). So, from having a functional-if-slightly-oversized-and-lower-quality picture on the TV screen I went to nothing, at least for my desired use.
Further research led me to the Intel HD 4000 settings, but those didn't even show that multiple screens were in use when the TV is attached. Finally, I tried using the NVIDEA Control Panel, but although multiple displays seem to be supported the best I can do when cloning is have the screens' resolutions meet in the middle at 1440x900, which makes them both look worse than the original plug-and-play result described above. Heck, I went so far as to enter the BIOS and try every combination possible under "Graphics": no NVIDEA, Integrated, Discrete, each with and without "Auto Detect NVIDEA capability" enabled and disabled. I even updated the NVIDEA driver to their newest, a version not available at the Lenovo Support site. Nothing. And worse, ever since my very first tweak under Windows display properties I wasn't able to return to the original functional-if-slightly-oversized-and-lower-quality picture.
At this point I used a very recent image to return my system to it's Pre Original Tweak state (allowing for the functional-if-slightly-oversized-and-lower-quality picture originally obtained), which is better than nothing, I guess, but surely not what I'd expect from a higher end laptop.
Please, does anyone know if there's a way to connect my T430, native resolution 1600x900, to an HD TV, native resolution 1920x1080, while actually maintaining each screens respective native resolution and not losing any of the image? Thank you again for your time.
Edit: After more research I've fit the desktop image to the screen by adjusting the TV's "Picture/Advanced picture/HD size" setting from "Size 1" to "Size 2". Now my only question is if it's possible to somehow play a 1080p movie at the TV's native resolution of 1920x1080 or if I'm stuck with the laptop's navtive resolution of 1600x900.

Try grabbing the latest NVIDIA driver off of the NVIDIA website. It might help.
Extending it should also allow you to run the 1600x900 T430 screen plus the 1920x1080 TV screen each at their native resolutions.
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" help me please" I have Windows 7 installed on my mac pro and Bought Mini DisplayPort to VGA Adapter to connect to lcd tv But it does not work? why? please help me

" help me please" I have Windows 7 32 bit installed on my mac pro and Bought Mini DisplayPort to VGA Adapter to connect to lcd tv But it does not work? why? please help me
I have to boot with a Windows
When I use the Mac operating system not have a problem and DisplayPort to VGA Adapter Working properly
why does not work with windows ?
What should I do؟
I'm grateful to give advice
tanks
[email protected]

Someone in another section answered this. Thanks.

Why can't the Thunderbolt port on the rear of the display support a Mini DisplayPort monitor?

I bear no ill will as I knew the situation going in and am happy with my beautiful Thunderbolt display, but I simply cannot understand this lack of a blatantly obvious feature.
Why I must unplug my Thunderbolt display from my MacBook Pro (and lose my USB keyboard, external HDD, and wired ethernet) because my Thunderbolt display - with what appears to be an identical Thunderbolt port on the rear, fully capable of powering a second Thunderbolt display - cannot power my 1080p HDTV through a Mini DisplayPort to HDMI adaptor.
I have hoped and hoped for a firmware or software update that would allow this, as it is seemingly an oversight or an anticompetitive measure, but nothing.
Any ideas, workarounds? So dumb.
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Answer?: http://www.macrumors.com/2011/09/28/apple-thunderbolt-display-teardown-reveals-p lethora-of-hardware-inside/
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Mini DisplayPort to DVI to VGA doesn't work (why?!)

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Thanks

Someone on Twitter mentioned the Mini DisplayPort to DVI output is DVI-D only, which means the VGA adapter wouldn't receive an analogue signal to convert to VGA.
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--Travis

Mini displayport to VGA not working anymore

Hello Everyone,
Macbook Pro 10.9.5 Mavericks
Mini displayport to VGA adapter to beamer
I recently bought a mini displayport to VGA adapter cable to use my beamer as an extra display.
The first 24 hours it worked and I could use the beamer as an external display which was great.
Only the next day it wasn't working and the beamer kept saying NO INPUT. My roommate has a windows laptop with VGA port and it still works on his laptop (before the incident and after).
I used the same cable only with the mini displayport to vga adapter inbetween it.
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     - Did a SMC reset.
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I really don't know what to do now. I just worked the first day and know my macbook doesn't even recognize it. doesn't matter which of the 2 ports (on my macbook) I use.
I hope there's is someone with a solution because I just don't understand why it's not working or ignoring my cable.
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This is the Mac Pro desktop forum. I requested your post be moved to the MacBook Pro laptop forum.

Does the "Mini DisplayPort to VGA Adapter" work with all Samsung tv models?

Does the "Mini DisplayPort to VGA Adapter" work with all Samsung tv models?

It's a VGA adapter. Nothing special about that. If your Samsung monitor supports VGA then it will work.
But why not go completely digital and use a Mini DisplayPort to HDMI adapter to skip the analog conversion? It also supports passing audio over HDMI.
About Mini DisplayPort to HDMI adapters

Mini DisplayPort to VGA Adapter problems

I connected my Apple Pro to my HD TV to watch streamed movies on my computer using the TV as a monitor. I was advised to purchase a Mini DisplayPort to VGA Adapter and all the connections fit. The first time I connected it was no problem. I watched the movie and the audio was fine. Then the 2nd time I connected I had no screen. It was a blue wavy screen on the TV, even though the computer screen was showing the show. I believe it may have been showing me some sort of screensaver application from what i've read on the forums but I have no idea why or how. Then the next day I tried again. The screen was fine but the audio quality was terrible. It was like listening through a cheap radio. Why am I having so many problems and the quality is not consistent. Are there settings I should change when I do this?

I have some good news.
Regarding the broken lines on the output of the Mini DisplayPort, it seems as though it "fixed" itself. My theory is, I recently installed Windows 7. Updated all the drivers on the windows side and got it to project properly with the new Intel 4000 graphic cards. Once that happened, it kind of "popped the cherry" on the port and now both Mac and Windows output properly through the Mini DisplayPort.
I've tested it with numerous adapters and once it outputed properly for the first time ever, all subsequent times work.
I now have tested in on LCD and DLP projectors, Philips monitors, Skyworth TVs, Sanyo TVs.
It's working with the Mini DisplayPort - VGA adapter.
It's also working with the Mini DisplayPort - DVI adapter as well.
Before I "popped the cherry" on the output port, nothing else worked. 1440x900 didn't work, neither did mirroring the displays. It just had to work once with whatever OS and after that it outputs fine all the time.
If you ahve the same problem as above, i'd recommend dual booting another OS, load the proper graphix drivers, get it to output properly once and hopefully it'll fix the problem like it did for my unit.
Thanks for everyone's input with the whole ordeal!
PS. after the initial output, it didn't matter which adapter I used. I kept the generic since it's cheaper, returned the apple one cuz it's exactly the same, and now bought a generic MiniDP - DVI for my at home workstation.
PPS. One final picture of it working....

I bought the mini displayport to hdmi adapter with the cable

(the ethernet high speed one that connects to the mini displayport) to connect to my sony bravia...and all I see is the Apple purple sky....why won't it work?

What are you expecting to see? The same images you see on the notebook screen or something different?
Sounds like you have the external screen set to act as a secondary screen (extend the desktop), but want it to mirror the main screen. You can control that in System Preferences > Displays.

Connecting my macbook pro 13" to Sony bravia via mini Displayport to HDMI

Hi,
yesterday I bought a new LCD TV Sony Bravia KDL-32EX600 (Full-HD LED) that has 4 x HDMI inputs.
I also bought a mini Displayport to HDMI and HDMI to HDMI cable.
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I've tested the TV with another laptop that has straight HDMI output from the gfx card and it works perfectly.
I have up-to-date MacOS and I also upgraded my TV's firmware to the latest.
I thought that maybe the miniDisplayport to HDMI connector is broken but why does the computer try to do something when I turn on the correct channel on the TV?
I'm out of ideas..

Hi madhenry,
I know it's a month on from your post, but I thought I'd add that I'm having exactly the same problem. I'm trying to connect my new MacBook Pro (15" core i7) to my Sony Bravia KDL-40EX600 using a mini displayport to HDMI adapter. When I plug the cable in, the MBP screen goes blue for one second then goes back to normal, but the system just doesn't detect the external display.
I've tried the MBP on other monitors and it works fine, so there is nothing wrong with the adapter or cable.
I've also tried plugging two other Macs into the TV (a 2008 15" MacBook Pro and a 2008 MacBook) and the TV works great with both of them.
So, it seems there's something specific to the new MacBook Pros that makes them incompatible with the Sony EX600 TVs.
I just talked to AppleCare about it and after trying a few things (resetting the PRAM, etc.) I was simply told that there's nothing wrong at all with the Mac and that this is simply a "compatibility" issue that I have to put up with. So, it looks like we're out of luck until (hopefully) a new Mac OS update fixes the issue.
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Mini DisplayPort to HDMI Adapter by Belkin for iMac 2009 failed to work

This is an SOS message. I have purchased another Mini DisplayPort to HDMI Adapter and I have iMac (27-inc, Late 2009) running OS X Yosemite (Version 10.10.1). I have carried out the connection of Mini DisplayPort to HDMI adapter to LG Plasma TV Screen, but there is no sign of any of the equipment reading or aware of the connection. Is there anybody out there who can help me make it work? Also, why is that Yosemite - System Preference, click on Displays does not contain - Arrangement? I'll greatly appreciate any useful tips from the community or apple support team.

Eric has helped in providing in dept understanding around the subject matter, but unfortunately, it has not provided the solution to the problem.
The Mini DisplayPort to HDMI Adapter when connected to the external Plasma TV screen, nothing happens. The System Preferences was accessed -and the Displays monitor sign was clicked, but it only showed - Display/Colour, which according to the instructions / descriptions contain in the - Video Troubleshooting Internal and External Monitors literatures and video, there seems to be missing - Arrangement / or AirPlay from my OS X Yosemite version.
The above is the version of OS X Yosemite - showing on my *iMac when clicked on System Preferences, and as result I have not been able to make the Mini DisplayPort to HDMI Adapter to LG Plasma TV Screen to work.
My *iMac is -
iMac (27-inch, Late 2009)
iMac10,1
(10.10.1)
MB952XX/A
Running OS X Yosemite
When the above image is compared with the following image below, there is definitely something missing and it’s probably affecting the Mini DisplayPort to HDMI Adapter to work in my connection.
Questions:
How can I make my iMac 10,1 (27-in, late 2009, currently running OS X Yosemite 10.10.1) to have the above AirPlay mirroring or Arrangement to activate the connection?
Are there other ways I can make the connection to work?
Is there any body who has a similar iMac specs and OS X Yosemite who has overcome connecting to external Plasma TV Screen?

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I've got a new unibody MBP together with a mini displayport to dvi adapter.
When I connected the dvi cable with the MDP2DVI adapter to my new MBP and my 3-months-old Benq 20" LCD monitor, nothing shown up no matter how I tried. The monitor just kept saying no signal could be detected.
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After searching around for a solution for some time, I am pessimistic of waiting for a solution from apple as I see some people had already address this issue in late 2008 but till now seems no solution had came out.
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keepyourpower,
For what its worth I've been having much the same issue with my Macbook Pro. Leopard will refuse to see the external display while Windows Vista on bootcamp 90% of the time will but not without some effort. I've been able to get Leopard to use the display after going in to Windows and manually selecting display attached in the display properties menu. It doesn't always work but it will sometimes.
I'm 100% sure there is a flaw in the logicboard on some of the 2.4 Ghz that is causing this issue. I recently sent my portable in for repairs and they replaced the display which is why it was in and the Logicboard. I'm not sure why they replaced my Logicboard nothing was wrong with it, but with the new one its having much the same problem as you. As I said before I'm 100% sure this is a hardware defect in the Logic Board and if you are within your 14 day return window I'd see about asking your local Apple store to exchange the unit for a new one.
Not really sure if this will help you at all but didn't want you to think you were alone with this issue..

Mini DisplayPort to DVI-D Dual Cable/Adapter for mid-2010 iMac?

Hi . . .
Sorry to pester with a question that's been covered from various angles before, but I'm new to the Mac world. Am a musician in BC, Canada doing a project remotely with people in Ontario. Decided to ditch my PC-based recording rig and went with a 2010 iMac and Logic Pro X (hallelujah!) because the other people are using Logic Pro X. So . . . I'm just learning the ropes.
Anyway . . . I have a spare monitor I want to run in dual setup extended desktop, and I'm not 100% certain of the cable and/or adapter I'll need. I'm also not sure why the adapters are bigger and seem to contain more internal components, whereas the cables just look like a simple "Plug 1" connected to "Plug 2" cable in a variety of lengths (in the same way you'd have a XLR to 1/4" phono cable).
Here's the info on my system, and any help would be greatly appreciated (will a cable suffice or do I need an separate adapter, DVI type, etc).
My iMac (mid-2010 21" Core i3 with Firewire running Moutain Lion 10.8.5):
http://www.everymac.com/systems/apple/imac/specs/imac-core-i3-3.06-21-inch-alumi num-mid-2010-specs.html
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http://reviews.cnet.com/lcd-monitors/acer-x223w-lcd-monitor/4507-3174_7-32627876 .html
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Thanks again . . . the assistance is appreciated.
Suds . . .

You are overthinking this.
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You want to use two displays ... your iMac's buit-in display + your Acer display as a second monitor (what you called "dual monitors"). You can do this, as I explained earlier.
Your Acer monitor's maxiumum resolution of 1680 x 1050 is not high enough to require a dual-link connection.
"In single-link mode, the maximum pixel clock frequency is 165 MHz that supports a maximum resolution of 2.75 megapixels (including blanking interval) at 60 Hz refresh. For practical purposes, this allows a maximum 16:9 screen resolution of 1920 × 1080 at 60 Hz (1915 × 1436 at a 4:3 ratio).
To support higher-resolution display devices, the DVI specification contains a provision for dual link. Dual-link DVI doubles the number of TMDS pairs, effectively doubling the video bandwidth. As a result, higher resolutions up to 2560 × 1600 are supported at 60 Hz [via dual-link DVI]."   (See Digital Visual Interface, Wikipedia)
You can connect almost any VGA, DVI or HDMI display to your iMac, using the appropriate cable and/or adapter. Of course, you always have to make sure that your cable has the correct gender plug on each end.   The Apple adapter I recommended has a female connector, so you will need a cable with a male DVI-D plug on one end. As for the other end of the cable, check the input on your Acer display to see what it has and select a cable that has an appropriate gender connector on the end that will plug into your Acer monitor.
In extended desktop mode, you can set separate (independent) resolutions for your iMac display and your external Acer display, taking advantage of the maximum resolution of each.   (For example, that's why the MacBookPro example you cited works, it's because that model MacBook Pro can support higher resolutions on an external display than it's built-in LCD panel can.)

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Why T430 mini DisplayPort is so unstable?

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