Laptop to tv with hdmi; no signal

I have a dell e1505 laptop with a newer hard drive but I had to do a reinstall recently. Do I need some sort of driver to show it on the tv?
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More about laptop hdmi signal
  1. Did it used to work before you did a reinstall?

    Try going to Dell's site and download the most recent video drivers for it.
  2. You will need to reinstall your video driver and check your resolution settings.
    see troubleshooting hdmi audio video if the steps given there can help you
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