Problem with the screen of a Dell Inspiron 1521

Hi
In your caseHi
normally with vertical stripes it can happen due to
1.a bad LCD (small little chip inside LCD and can't manual repair)
2.a loose connection cable
so here what I do is first I try to tap at the back of the LCD and see that the problem goes away or not.If yes then a loose connection.
if no what I would do here ,coz I have a spare LCD I just exchange to test it...if the problem goes away then a BAD LCD.
Incase of verticle line due to bad LCD you can't repair it trust me.All the small IC chips are blended with board and can't really be repair.More quesiton feel free to post here.
goodluck,takecare.