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MacBook to Samsung T240HD via DVI no display detection

8610 Views 9 Replies Latest reply: Aug 13, 2009 5:38 AM by hyde- RSS
jageffen Calculating status...
Currently Being Moderated
Apr 24, 2009 11:43 AM

I just bought a Samsung T240HD Display and want to connect it to my MacBook late 2008.
In order to connect the two I bought a Mini DisplayPort to DVI connector plus a DualLink DVI cable.
When I connect all of it, my display goes to sleep and the MacBook doesn't detect the display.
When I only connect the cable to the display and the adapter to the cable without hooking it up to the MacBook, the display detects a connection, but obviously there is no input signal.

The question is, of course, what the **** is wrong?

Thanks for any answers!
MacBook, Mac OS X (10.5.6)
  • Waymen Level 5 Level 5 (5,635 points)
    The specs on the Samsung T240HD say it has a resolution of 1920 x 1200. If so, you don't need a Dual-Link DVI connection. This could be the problem since without Apple's Dual-Link DVI Adapter the mini DisplayPort can only handle Single-Link DVI.

    Thus, I think you need a Single-Link DVI cable and that should work just fine for a 1920x1200 resolution.

    Here is a link which will describe what you need:
    Mac Pro 2.66GHz 2GB RAM, Mac OS X (10.4.8)
  • z1ross Calculating status...
    yes Also they used the wrong connector on the t240HD that will allow you to use a DVI-DL (Dual Link) cable. Technically you cannot use a dual link cable on this setup and the Display doesn't support Dual link mode, hence it goes to sleep because not all the proper connections are working in standard DVI-D(digital) format.

    So return the poorly made Apple mini-displayport Dual link adapter and either get a display port to DVI cable, or a standard DVI cable and connect it to the displayport>DVI adapter and go from there.
    2x8 macPro 3.3Tb, 16Gb mem, 17" SR MBP 2.4ghz 4gb mem, 15" MacBookPro 2.16ghz, Mac OS X (10.5.6)
  • gorrocs Calculating status...
    Hey, did you find a solution yet?

    I'm having exactly the same problem. My setup: MB Unibody + Mini Displayport to DVI adapter+ Vivanco DVI-D Single Link Cable + Samsung T240HD = No signal and goes to sleep! This happens in Leopard as well as in Vista.

    The thing is i just tested the same setup with an Dell E1909W and it works like a charm.

    I try to look for a solution before spending another 29EUR on a mini displayport - vga adapter...
    Macbook Unibody, Mac OS X (10.5.6)
  • justin_6998 Calculating status...
    i have MBP uni + mini displayport to dvi adapter + T240hd, and it works, the only problem is the mirror function, it mirror the 1400 x 900 resolution right into 1900 x 1200 so it looks like blur images but without mirror it works great.

    u guys might want to try to plug the minidisplayport while ur computer is off and start the MBP see if that works to detect the display. I experienced something similar where everything is on, i unplug the minidisplayport cable and detection problem happen but i just plug and unplug the cable several times and it works again.

    hope this help.
    Macbook Pro 2.53GHz Unibody, Mac OS X (10.5.5), 4GB RAM 7200-320gb
  • dreamcreamer Calculating status...
    I have the same problem with my T260HD. HDMI works great (1920x1200), but DVI doesn't. I can configure it to run at 1920x1200 in vista, but when I logoff/logon again the screen goes blank and stays blank. Plugging in the cable in another monitor and then in the T260HD seems to 'wake up' the display again. Dual link cable doesn't help.

    Is there any conclusion on what the real problem is ? Is it the firmware or the Samsung monitor driver ? Anybody got this setup to work ?

    related post: s-4850
    Macbook, Mac OS X (10.4.11)
  • Photastic Calculating status...

    i got the same problem with DVI and the T260HD. today i try the same setup in a shop with an T240HD and it works great. and i try it with my old PowerBook G4 without any DVI Adapter and it works great too. only my MacBook Pro don't like the T260HD!?
    MacBook Pro Unibody, Mac OS X (10.5.7)
  • Sajonara Calculating status...
    Hi there,

    I have the same problem with a T240D and it's not only a problem connecting my unibody first generation 13" but as well connecting it to my Mac Pro with a Radeon in it. This problem as well happens under different circumstances - let's say other OS. Vista for example does have the same issue. I'd gladly hear when someone has a proper solution to this problem.

    Kind regards,

    Mac Pro, Mac OS X (10.5.7)
  • hyde- Calculating status...
    I have the same problem. 3 DVI cables later I settled for using a DVI/HDMI cable. Still would like to find out where the real problem is though.


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