Many vertical line of different colours which won't go.

Vertical lines might be caused by a faulty T-Con board or just loose wiring. Slap your television from different angles at the back and see if the lines go or it gets a little better. If yes, it means it just might be a lose wire. In that case, open the back of your TV and check the board for any damage or lose wiring. This video might help -

If this doesn't solve the problem, you will have to replace the T-Con board. You can do this yourself if you want to give it a try by searching for the correct T-Con board using the model number of your TV or call a serviceman.