How do I connect the Dell inspiration Duo to LCD/plasma TV. I know it does not have VGA/HDMI output, but is there any converters which I can use to connect it to TV?
You'd need an external, USB video input/output device. Bear in mind that this is a basic netbook with different externals -- it's not going to be capable of pushing high definition video of acceptable quality.
The CPU/GPU combination is very weak for video purposes.
Something like this should do the job:
However, as above - don't expect much from the video in this system -- it's just not that capable.