I have a laptop which recently I am hearing an unknown whistle (exhausting noise sound with a high frequency) from it. I found out that the whistle stops in the following situations:
- When I move the scroll of mouse,
- When screen saver is displayed,
- When I take a copy of a file (during copy the whistle stops).
Please take attention that the noisy sound is near hard drive. So, My first idea is that the whistle is related to the hard drive.
The whistle really annoys me!
Any idea about the issue is appreciated.