Lenovo B50-45 Notebook - Manual (Page 34)

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Chapter 4. Troubleshooting
Sound problems
No sound can be heard
from the speakers even
when the volume is turned
up. • Make sure that:
‐ The mute function is off.
‐ The combo audio jack is not used.
‐ The speakers are selected as the playback device.
Battery problems
Your computer shuts down
before the power and
battery status indicator
shows empty.
-
or-
Your computer operates
after the power and battery
status indicator shows
empty.
• Reset the battery gauge using Lenovo Energy
Management. If the problem persists, replace with a
new battery pack.
The computer does not
operate with a fully charged
battery. • 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.
Hard disk drive problem
The hard disk drive does not
work. • In the Boot menu in the BIOS setup utility, make
sure that the hard disk drive is included in the EFI
list.