The Acer Extensa 5620 is a budget laptop built by Acer. In the case of the audio components, the weakest link is the built-in Intel audio controller, which is the poor man's sound card because it saps resources from the processor instead of doing its own processing. This can lead to audio bugs and even crashes.
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Since the Intel audio chip saps processing resources from the main processor, it can be slowed down if the main processor is overloaded. This can result in the sound cutting out or becoming out of sync with any video that is playing. Shutting down programs that are not being used can give the Intel audio chip more resources and solve the glitches.
The Acer laptop and the Intel audio chip have drivers that run the hardware chips. These drivers are updated on a regular basis to make the chip run more efficiently. Downloading and installing these drivers can fix any bugs that were not corrected when the laptop was made. Restart the laptop after installation to ensure the driver updates propagate through the system.
The colder a computer is, the faster it runs. The inverse is also true and if the Extensa is overheating, it can develop audio glitches as the chip slows down. By removing the laptop from the heat source, you can correct any audio glitches by allowing the chips to run at their optimum temperatures.
The audio problems with the Extensa may not be due to any computer problems but instead a simple broken speaker. Plugging in a pair of headphones can quickly tell you if the problem is with the speakers or the chips. If the headphones work fine when plugged in, the speakers have blown out. You can have the speakers replaced at any computer repair store.
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