A user reports that her CRT display experiences sporadic problems, especially on hot days. It also has a high-pitched whine. What should you do? (Select TWO.)
1. Instruct the user to clean the monitor by spraying window cleaner on it and using a soft cloth.
2. Instruct the user to use a computer vacuum to clean the dust from the monitor's vents.
3. Open the monitor's case and verify that the cooling fan is functioning.
4. >>Ensure that there is sufficient airflow around the monitor.
5. >>Verify that the monitor's power cable is secure.
Explanation : A monitor generates a lot of heat. Therefore, you should ensure that there is enough ventilation around the monitor.
The high-pitched whine generally indicates that the monitor is dirty on its interior. You can clean the inside of a monitor by using a computer vacuum along its vents.
You should not clean a monitor by spraying any liquid on it. Doing so could cause the liquid to get inside the monitor and damage it.
You should not open a Cathode Ray Tube (CRT) monitor. Doing so can cause electrical shock or even death unless you are specially trained to work on CRT monitors.
Verifying that the monitor's power cable is secure will not resolve the problem. A loose power cable would prevent the monitor from functioning. It would not cause a high-pitched whine. The sporadic problems are caused by heat, so a loose cable is unlikely to be the cause of the problem.
Objective: Personal Computer Components
