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In Windows 7 ,Try the Power Options in Control Panel. Set to High Performance, select Change Plan settings, set Sleep to never, select Advanced Power settings, scroll through the Advanced Power settings, set Sleep and Hibernate to Never and Power Buttons and Lid to Shut down. Always shut down and unplug the Laptop when not in use to prevent damage due to a power surge and a possible Fire hazard IF the battery malfunctions. Not to mention unnecessary wear on the components.
Is it turning ON? if nothing shows on the screen then the loud noise happens then possible it is something hardware in your system.
If the noise is coming from the speakers and windows loads then that is a speaker issue.
Better check with acer if the laptop is still in warranty for repairs and proper checking.
The high pitched noise you hear is most likely caused by the CPU cooling fan on your laptop. If you suspect that this high pitched sound is caused by the fan going out, you can spray your laptop with compressed air to get the dust off of the fan. This solution will make your laptop work at a cooler temperature, and reduce the noise.
If the problem persists, seek a certified laptop repair specialist.
The problem might be the power supply charger that plugs into the laptop, unplug the charger and run the laptop on battery power, is the high pitch sound there when you power up? if this solves the problem, it is the power supply charger that is the cause.
So according to you it is making a high pitched noise. OK. So here's the answer. This type of issue is seen in some reasons. The first thing is that the Laptop's Fans. This noise issue is a generic issue for most of the laptop's of this model. The fans of the laptop can be dirty. They can make the noise. The noise can also be from HDD. Also the final point which can cause this problem is the FL Inverter Board is faulty. This problem is a very complicated issue. If you are under warrenty, you can easily get a free repair as this issue is complicated. Also if you are not under warrenty, you can check the laptop's internal parts with the help of a Service Manual.
Thank you Sir, Have a nice day.
By chance have you tried making sure the laptop is not too close to the speakers? Sometime you will get feedback when the source is to close to high powered speakers. Also, check your jack cord and make sure no splits/cuts are visiable and the plugs are fully inserted.
Hi there. Your microphone is on, and when you close the lid it is closer to the speaker. It needs
a loud noise (like closing the lid faster) and it enters into a feedback loop.
We need to find a way to make the microphone not play back.
Try left clicking on the speaker icon in the bottom right of the screen, and click playback
options. Here mute the microphone, and see if it solves your problem.