Samsung SyncMaster T220HD DisplayPort to DVI connection problem

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Samsung SyncMaster T220HD DisplayPort to DVI connection problem

I have a Samsumg SyncMaster T220HD monitor.
I recently bought a new MacBookPro with the following characteristics:
Model Name: MacBook Pro
Model Identifier: MacBookPro5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.8 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Boot ROM Version: MBP51.0073.B02

Here is the link to my monitors specs:
http://www.samsung.com/us/consumer/detail/detail.do?group=computersperipherals&t ype=monitors&subtype=lcd&model_cd=LS22TDNSUV/ZA

When I connect my mac to the monitor with a DVI-D cable the monitor's screen starts flickering and I see blinked pink pixels everywhere.
I tried with and old Mac Book Pro and the monitor works just fine.
I think that the display port doesn't supprt my resolution (1680x1050) ; in fact if I decrease the resolution to something like 1200x900 the problem disappears.

I also brought my mac to the apple support center here in Italy, but the problem persists with every new Mac Book Pro they tried.

Do I have to wait for e patch? What can I do? this problem is very tiresome!

Thanks.

<Post Relocated by Moderator>

Mac Book Pro, Mac OS X (10.5.5), MacBookPro5,1

Posted on Nov 21, 2008 6:14 AM

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Answer 1

Jan 28, 2009 10:37 AM in response to Overwhelmer

I have a similar problem with a new Macbook connected via mini displayport DVI adapter, when connected the mac screen goes blue for a second then resumes as normal, but the monitor screen flashes NO INPUT SIGNAL. Any help at all?

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Answer 2

Feb 2, 2009 10:53 AM in response to AkillesLDN

I have the EXACT same problem! The Monitor is new I only bought it last week so I could take it back, but it's got to work surely? I was so disappointed, pretty much the only thing with that is concerning my mac which didn't "Just Work".

Anyone know the answer?

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Answer 3

Feb 9, 2009 9:39 PM in response to Igneosaur

Has any one got a solution yet I just bought a T220HD and it works fine with my older macs but not the MacBook5.1

This mini Display port is seems to have issues. I will think twice before recommending an upgrade of the 20 laptops at work.

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Answer 4

Feb 10, 2009 6:33 PM in response to Igneosaur

Found a Work around for now:
I did some testing on the mini displayport VGA adapter.
Observation: when hooking up the T22HD using VGA adaptor to Macbook5.1 the computer recognized the monitor in monitor preferences an indication of bidirectional communication, the T220HD displayed "Week or no signal"

Test:
1) I use a VGA cable of Higher quality. No Change
2) I tested a MacBook Pro 17' DVI to VGA and a MacBook with Mini DVI to VGA adapter Both worked fine with T22HD.
3) I instaled a powered ExtronVGA Splitter in into the mini Display adapter with the MaBook5.1 then took a VGA cable from splitter to T220HD. Image came on to the T220HD imideitly.

Summation:
Signal strength is lower on the Macbook5.1 then others.
I will be testing the DVI with a splitter or sinal boster of some kind.

I wonder if apple can release an update to boost voltage or signal to the port.

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Answer 5

Mar 23, 2009 7:46 PM in response to Overwhelmer

Good Job Apple just released a Update for this

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Answer 6

moknam

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Apr 2, 2009 6:15 AM in response to redbrindlejake

I have similar problem with my Samsung SyncMaster 225MS and the new Mac Mini.

I plug the DVI cable to my syncmaster through the mini-DVI to DVI adapter which is included in my mini. The screen looks fine in 1680 x 1050 mode, BUT, the screen will flash intermittently, sometimes the whole screen flash, sometimes part of the screen flash (usually at the bottom).

I tried...
1. Set the display resolution to 1280 x 1024 --> NO FLASH
2. Set the display resolution to > (1280 x 1024) --> FLASH INTERMITTENTLY
3. Connect the mini to my Benq 21" 4:3 monitor --> NO FLASH

What's going on?!! How come my previous IBM R40 can output 1680 x 1050 without any problem, which was actually a 6 year-old product!!

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Answer 7

Apr 7, 2009 10:23 AM in response to redbrindlejake

Same problem here on a new Macbook Pro '17. I'm unable to use my Samsung SyncMaster as the signal is to weak.

What update should I look for? Any advise..:(

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Answer 8

moknam

Level 1

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Apr 7, 2009 10:34 AM in response to appels en peren

You may try SwitchResXControl.

I changed the refresh rate to 59Hz. Problem PARTIALLY solved. 🙂

PARTIALLY = the screen flash once in 2 days, good enough, right?

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Answer 9

DJcTek

Level 1

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May 18, 2009 11:01 AM in response to Overwhelmer

I just bought this TV and I'm also having problems. I have the previous generation Mac Pro with one of the new ATI Radeon HD 4870 graphics cards, I also still have the standard graphics card that came with it (ATI 2600XT).

Ok here's what works and what doesnt work:

- ATI Radeon HD 2600XT DVI (DualLink Cable) to DVI input On TV - Works Fine
- ATI Radeon HD 4870 DVI (DualLink Cable) to DVI input On TV - DOES NOT WORK!
- ATI Radeon HD 4870 DVI (DVI to VGA adaptor plugged into graphics card) to VGA input On TV - WORKS!

I also tested the 4870 on an old monitor with a DVI-D to DVI-D and it worked! This is frustrating because I am working with a very high spec Mac Pro and Graphics card but I have to compromise with a DVI to VGA Adaptor.

I saw a software update on the TV menu but couldn't find anything on the Samsung website

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Answer 10

eww

Level 9

53,052 points

May 18, 2009 11:07 AM in response to DJcTek

Hi, DjcTek. Repost your question in one of the Mac Pro forums, where other people who have the same machine you do will see it.

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