[Resolved]  HCL Me Tablet — Erratic System

I have purchased a HCL V2002 Laptop on June 2007.
After one month I started to face problems .
1#.My System sometimes hang although sometimes crash(blue Screen) while othertimes It continue to work after hang up.
Mostly happen when I am listening to Music.The Music will now change to a loud noise.
2#.My DVD Writer is not working properly. Half of My CD/DVD are not written although they are of good quality.It also don't read DVD and CD which work perfectly on other computer.
3#MY onboard LAN Card does not work whenever I use a PC to PC
Lan Cable to connect two computer(During transfer of Data).
4#.Biggest Problem is that my LCD Problem is not working Properly.It becomes black and that really frastate me.My screen also fliker at brightness at maximum .