This might not be your specific Laptop it might give an insight into the problem and guide you to installing it
The 15.4 inch display on your Dell Inspiron 1525 laptop computer works well for basic computing, but its 1280 x 800 pixel XGA display can't compare to the image produced by a high-definition television. The Inspiron 1525 features several output ports that allow you to easily connect the computer to your HDTV. This makes it convenient to use video streaming services such as Netflix and Hulu to watch movies on your television.
Connect the HDMI cable to the HDMI port on the left side of the computer, just in front of the RJ-11 modem cable port. Attach the other end of the cable to the HDMI port on your HDTV. The exact location will vary among the various brands and models, but it should be on the rear panel. Select the HDMI option on the television's video source menu. Most televisions have a source button on the remote that makes changing the input source easy. Turn the computer on. Once it boots, open the control panel and select "Appearance and Personalization." Click "Display Settings" followed by "Advanced Settings." Select the "Intel" tab and click the "Graphics Properties" button. Choose the "Intel Dual Display Clone" option and close the windows. What you see on your computer screen will also appear on the television. Right-click on the speaker icon in the bottom-left of the screen and select "Playback devices." Select HDMI in the list of devices and click "Set Default" in the bottom of the window.
Dell Support
http://support.dell.com/support/edocs/systems/ins1526/en/om/specs.htm
b> Dell Inspiron set up guide
http://www.google.com/url?sa=t&source=web&cd=1&ved=0CBkQFjAA&url=http%3A%2F%2Fsupport.dell.com%2Fsupport%2Fedocs%2Fsystems%2Fins1525%2Fen%2FSG%2FY465HA01MR.pdf&ei=QvdvTazmLoT6swPys_HRCw&usg=AFQjCNFAL6amwbikPJgeczXX6AVDagqq2A&sig2=BuSMnYCOSI8qeDg_R
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