Why does my computer monitor turn on and off?

Why doesn't my computer monitor turn on if i just bought it and with my old computer does turn?

  • when i plug my old computer it does work bout when i put to my new computer it doesn't turn on and i have a 450w power supply.. MY PC has 2 video cards 2 ddr3 ram nvidia ge foce video card sound card 3 led fans cpu fan and a striker extreme 2 mother board...

  • Answer:

    Video cards are conflicting with each other. Use one card.

azultibu... at Yahoo! Answers Visit the source

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