How to display my laptop screen on my tv?

It depends on the ports you've by your computer and on your TV.

The cardinal primary types are (within increasing quality):
1. VGA http://www.thisishowyoudoit.com/blogimag…
2. S-Video [2 types: 4Pin as in picture|7Pin] http://akamaipix.crutchfield.com/graphic…
3. DVI http://www.tech-faq.com/dvi-hdtv-connect…
4. HDMI http://www.k1cable.com/images/hdmi_000.j…

Check if your TV has corresponding ports. If not, you can obtain adapters. This is an example of a VGA to RCA(Red/White/Yellow analogue cables) and S-Video http://img.alibaba.com/photo/52306528/VG…