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It means that you are sending a high resolution or framerate HZ not supportd by the Hitachi.
Try to start from 1024 at 60 HZ and then you step up a level at the time.
until you can see at max supported resolution
Check the display settings on your laptop to see if the external monitor output is disabled. There is usually a function key on the keyboard with a picture of a monitor on it which can be used to switch between internal & external monitors. You may also need to try on another monitor/TV or change the HDMI lead.
I am assuming that you are talking about a Nintendo Wii. When you buy a Wii it comes with standard RCA composite cables that are three colors, Red, White and Yellow. Yellow is the cable that carries the video signal and the red/white carry the stereo audio signal. You would need to connect these cables into the corresponding color inputs on your tv. Plug the yellow ended cable into the yellow jack on your TV and do the same for the red and white cables. After this is done, you will need to switch your tv's input to the input that corresponds to the one you plugged those cables into. Some newer flat panel TVs do not come with RCA composite inputs. If this is your problem, you will need to get some component cables for your Wii. These cables look identical to RCA (composite) cables but come in colors red, green, blue, red and white. In this case the red, green and blue cables carry the video signal and the red and white carry the audio. You can purchase these from just about any store that carries the Wii or online from places such as Amazon.com.