Lenovo Y520-15IKBN User Manual page 28

Chapter 4. Troubleshooting
Sound problems
No sound can be heard
from the speaker even
when the volume is 
turned up.
Battery pack problems
Your computer shuts
down before the battery
status indicator shows
empty.
-or-
Your computer operates
after the battery status
indicator shows empty.
The computer does not
operate with a fully
charged battery pack.
A hard disk drive problem
The hard disk drive does
not work.
Recovery System problems
Failure to restore system
partition to factory default.
• Make sure that:
- The Mute function is off.
- The combo audio jack is not being used.
- Speakers are selected as the playback device.
• Discharge and recharge the battery pack.
• The surge protector in the battery pack might be active. Turn
off the computer for one minute to reset the protector; then
turn on the computer again.
• Make sure that the hard disk drive is included in the Boot
menu in the BIOS setup utility correctly.
• The system partition (e.g. the partition size or the drive
capacity of C) has been modified.
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