1) First, state the Make and Model of your monitor in your post. First. First. FIRST! In fact, make it part of your subject.
Most monitors have a specific cure for specific symptoms, so if you're going to post, don't be general about it...be specific.
If you can't figure out what kind of monitor you have, take a picture of the CHASSIS and attach it to your post.
2) Be descriptive. Don't just say "hi my monitor doesn't work I don't know why can you help me" because that doesn't tell us jack diddly squat. Describe the problems in detail, include anything you may have done to make the problem (or correct it)
3) Usually, the model of your monitor is NOT on the tube! If you see a sticker with a number like "A63xxxxxxx" that's not the monitor type, it's the tube type. Keep looking.
4) If you live in Europe, please let us know. The electrical system there is different from the one in the US, and we deal mostly with people in the US.