DVI to VGA cable disables trackpad

Used the mini dvi to vga cable for months with no problem. Today i plugged in the DVI and the track pad was disabled - could not use track pad at all. Additionally when i select system preferences and display the display is automatically reverted to 800 resolution. Searches suggest that I go in to system preferences and display and select arrangement to use mirror mode - but when i go to displays arrangement is not an option. Perhaps this is only available when the dvi is plugged in, but alas when i plug in the mini dvi to vga i cant do anything as the trackpad is disabled.
I dont know what happened, what changed or how to go back to where i can simply plug in the mini dvi and watch downloads on my TV -
Very frustrated

Welcome to the Apple Discussions!
It sounds to me like you have a defective Mini-DisplayPort to VGA adapter. I would call AppleCare Support or take the adapter in to a local Apple store or Apple Authorized Service provider to have it checked out.
-Doug

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Mini DVI to VGA cable doesn't send signal to the projector

I just received a mini DVI to VGA adapter cable today.
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I'm still stucked.
By reading some articles, it says even using mini DVI adapter, the signal is still digital and if the projector doesn't accept digital signal then it's no use....
My projector is Epson EX3200 and it doesn't have any DVI or HDMI input.
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http://support.apple.com/kb/HT2369 shows only one kind of mini-DVI port for the 12" Powerbook. Sounds like you got something that is not an mini-DVI port based cable. Mini-VGA cables look very similar, and can be misidentified. What are you connecting to from the Powerbook G4? Make, model # is important. Often DVI-HDMI adapters are better than DVI to VGA if there is an option. Cause DVI-VGA you need a proper digital/analog converter in the cable in question.

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Message was edited by: barndoor34

Mini DVi to VGA colour issues

Hi,
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Hi DoDolom,
First, welcome to Macintosh!
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Hi all.
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I have looked all over and I can't find a solution.
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Mini-dvi to vga problems.

Hello,
I recently bought a min-dvi to vga cable and tried to connect to my tv. The TV is relatively new and supports hd. However, when I click detect displays, the mac doesn't recognize the tv. The tv turns on for a split second and says 'no signal'. Then it goes of, and I have no second monitor. Can anyone help me?

If the TV has an HDMI connector (it should if it's a recent HDTV), you should use it instead of VGA. HDMI will keep the signal all digital from the computer to the screen. VGA is analog.
If your iMac is a model before the current 2009 model, you can get something like this to go from mini-DVI to HDMI.
[PTC Mini-DVI to HDMI Adapter with 6ft HDMI Cable|http://www.amazon.com/gp/product/B001H0REVK/ref=s9subs_gw_s0_p23_t5?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=07SX5KQPE80BYX6 0XD8Z&pf_rd_t=101&pf_rd_p=470938631&pf_rdi=507846]
or this one if you have or want to get the HDMI cable separately
[Mini-DVI to HDMI Adapter|http://www.amazon.com/Mini-DVI-to-HDMI-Adapter/dp/B001PVUIL4/ref=sr16?ie=UTF8&s=electronics&qid=1242504557&sr=1-6]
(there are other listings on Amazon)
The iMac should properly recognize the HDTV over HDMI.

Macbook Pro + DVI to HDMI cable + HDTV = only 1080i?

Hi all,
I connected my MBP to my TV via a DVI to HDMI conversion cable ($24 from Fry's), but the highest resolution I am getting is 1080i (confirmed on the computer, and the system readout on the TV). Are there other settings that I missed (in the computer or the television) that I need to configure in order to get full 1080p out of this setup? Or is it the cable? Any help on the matter would be great!
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Computer: Apple Macbook Pro 17" High-res 2.4 GHz
Television: Sony BRAVIA V3000 46"
Receiver: Onkyo TX-SR605

Hi guys, I just got my Samsung LE40M87BD working on my MacBook Pro running Leopard in full 1080p resolution. Steps:
Install DisplayConfigX from www.3dexpress.de
Start DisplayConfigX
Select the correct monitor in the top dropdown list
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H V
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DVI to VGA cable disables trackpad

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