Lenovo Y40-70 - Manual (Page 35)

Chapter 4. Troubleshooting
29
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 being used.
- Speakers are selected as the playback device.
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 operating time for a fully
charged battery pack is short.
• Discharge and recharge the battery pack.
The computer does not operate
with a fully charged battery
pack.
The battery pack does not
charge. • 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.
A hard disk drive problem
The hard disk drive does not
work. • Make sure that the hard disk drive is included in the Boot
menu in the BIOS setup utility correctly.
OneKey Recovery System problems
Backup cannot be made. • Make sure that you are currently using a Windows
operating system.
• There may not be enough space to store the backed-up data.
You will need to free more hard disk space on your backup's
partition.
Failure to restore system
partition to factory default. • The system partition (e.g. the partition size or the drive
capacity of C) has been modified.