Useful information to include:
1. How it is used?
(Portable/Desktop? Ceiling installed?)
2. How it is connected to other devices?
(Factory cable? Cable length?)
3. What devices are connected when the problem occurs?
(Laptop, Desktop Computer, DVD Player, Other source?)
4. What you do?
(The steps that bring you to the problem.)
5. What happens?
(Describe the problem.)