Hello everyone. I currently use computers Dell 3543. I have a sound problem. Everything was normal until yesterday. I start the computer up, it is normal. When I open any sound file everything normal at first but come 3:01 minute audio or around then suddenly small abnormality about 3 seconds and sound back to normal again. Although the sound was heard but I find it annoying when encountering this problem. I tried to uninstall the drivers and reinstall, but things are still the same. I did update the bios from A6 to A7, but things did not improve. I tried using the Dell Diagnostics functions but everything remains normal newspaper. So anyone encountered this bug like me. Please help.