brought this laptop Aspire 7 on 11/5/18 and the sound keeps crackling
check your BIOS version, if it's below 1.10 please update it:https://global-download.acer.com/GDFiles/BIOS/BIOS/BIOS_Acer_1.10_A_A.zip?acerid=636419926792860335&Step1=NOTEBOOK&Step2=ASPIRE&Step3=ASPIRE A715-71G&OS=ALL&LC=en&BC=ACER&SC=PA_6to check BIOS:windows logo + r keystypemsinfo32read BIOS date versionto update BIOS, unzip the downloaded file and run the exe with battery at 100% and AC charger pluggedplease download and install this drivers too:https://global-download.acer.com/GDFiles/Driver/Chipset/Chipset_Intel_10.1.1.38_W10x64_A.zip?acerid=636336247443805749&Step1=NOTEBOOK&Step2=ASPIRE&Step3=ASPIRE A715-71G&OS=ALL&LC=en&BC=ACER&SC=PA_6https://global-download.acer.com/GDFiles/Driver/IO Drivers/IO Drivers_Intel_30.100.1633.03_W10x64_A.zip?acerid=636336247846270269&Step1=NOTEBOOK&Step2=ASPIRE&Step3=ASPIRE A715-71G&OS=ALL&LC=en&BC=ACER&SC=PA_6
If still you have the same issue I would strongly you to get in touch with Acer support, use this web link to avail Acer support.
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