Hi i have a hissing sound from inside of the laptop and it distorts the sound in the headphones outlet. I really wonder what this would be and the main problem is i cant use it for any of my audio projects because of this distortion.
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1. In most cases the problem maybe due to the powersupply. If the filter capacitor or the diodes are not working properly in the power supply, it could give the distortion sound. Use a different powersupply to see if it solves the problem.
2. The mic wire can also catch some hissing noise sometimes. Disconnect the mic wire from the motherboard and see if it solves the problem.
This isn't really a solution, but should be relevant. If you think that cleaning might be the issue, don't be too afraid to really dig in there. The part you see is just a cover, not the speaker diaphragm itself. I've had the tip part fall off (well, sort of break off) and that whole assembly doesn't do anything but cover the speaker. The real deal is pretty deep in.
Yes in a laptop Sound Card is comes as a integrated part of System. Before doing anything else it is highly recommended that you must download the Sound Driver from the Acer website and then install it on your Laptop. Be careful download the only sound Driver that related to your laptop model by using your laptop serial no.
It seems there is driver related issue. You may reinstall/update your driver. For further assistance please post your question. Also can you please tell me whats your computer's part number and operating system?