Lenovo B41-80 User Manual page 35

Sound problems
No sound can be heard
from the speakers even
when the volume is turned
up.
Battery problems
The computer does not
operate with a fully charged
battery.
Hard disk drive problem
The hard disk drive does not
work.
• Make sure that:
- The mute function is off.
- The combo audio jack is not used.
- The speakers are selected as the playback device.
• The surge protector in the battery might be active.
Turn off the computer for one minute to reset the
protector; then turn on the computer again.
• In the Boot menu in the BIOS setup utility, make
sure that the hard disk drive is included in the EFI
list.
Chapter 4. Troubleshooting
29