Why does my Macbook pro 2008 not recognize my external dell flat monitor(TV)?

Hello all ,
Its hooked up with a dvi cable from mac dvi port to dell monitor dvi port. My macbook is running mountain lion.
The Monitor light on the front blinks green and then goes into " power save mode" a black screen.
Thanks for any ideas on how to get this external monitor working.

Reboot, then try this
http://www.ehow.com/how_5811316_connect-macbook-dell-external-monitor.html
I'm really guessing here actually since no one answered your post.
You might find better luck searching on Google "Macbook pro plus Dell monitor" for the most recent information.
The SwitchREsX is supposed to be very capable and enable more resolutions for other monitors besides Apple ones.
I think you can hold option/alt when clicking on Displays in System Preferences for a more complete list of options.
Sorry I can't be of more assistance.

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Manufacturer:          SMP
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PCB Lot Code:          0
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Hardware Revision:          2
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Display Sleep Uses Dim:          Yes
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39484 Shockwave Flash (Chrome P me         53.5     189.5 MB        1.05 GB
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