Sound was working fine then it went out.
Firstly you could find the reason to this problem.
Check if the sound is mute.
Check if the sound card driver is outdated.
In most cases, the problem is causedy be the bad drivers. So reinstall or update the audio driver could solve this problem. The easiest way is to use a driver scan and download tool to check for. OSToto Driver Talent is the tool I use. You also have a try.
Driver Talent Download Update and Fix Drivers Ostoto
Check the MUTE setting has not been set on the speakers.
Check the Volume setting, move to a higher volume level.
Try re-installing the Audio driver.
SOURCE: can i upgrade my lenovo 3000 g430 cpu
No. But you can upgrade your RAM to maximum value to get more speed and efficiency.
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