I have a dv7-1132nr Labtop and I have a 56 mitubishi DLP TV that is about 3 years old. When I hook up the HDMI cable the TV doesn't have any image and the labtop doesn't even register there is a DLP TV connected. When I hook it up the same way to the LCD TV it is fine.
Easy...first connect the hdmi cable between laptop and tv. Press and hold the 'fn' key on the laptop keyboard - bottom left corner. while holding the fn key, press and release the F4 key. This will toggle the laptop between its multiple display capabilities.
Press and holfn - press and release F4 until you get an image on the big screen.
Enjoy :)
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