Lenovo 3000 G430 User Manual page 51

Sound Problems
No sound can be heard from the speaker even when the volume is
turned up.
Make sure that:
The Mute function is off.
The headphone jack is not used.
Speakers is selected as a playback device.
Battery Problems
Your computer shuts down before the battery status indicator shows
empty.
-or-
Your computer operates after the battery status indicator shows
empty.
Discharge and recharge the battery.
The operating time for a fully charged battery is short.
For details, See "Handling the Battery" in Chapter 2.
Chapter 4. Troubleshooting
43