User’s Manual 10-17
Troubleshooting
USB Sleep and Charge function
For more information and settings, please refer to the USB Sleep and 
Charge section in Chapter 7, HW Setup.
Problem Procedure
I cannot use the "USB 
Sleep and Charge 
function".
The setting of "USB Sleep and Charge function" 
may be [Disabled]. Change the setting to 
[Enabled].
When there is a current overflow of the external 
device connected to the compatible port, USB 
bus power (DC5V) supply may be stopped for 
safety reasons. When this happens, disconnect 
an external device if some external devices are 
connected. After that, turn the power of the 
computer ON/OFF to restore the function. If this 
function can not be still used even if only one 
external device is connected, stop using the 
external device because its current is over the 
acceptable value of this computer. 
Some external devices may not be able to use 
the "USB Sleep and Charge function". In this 
case, please try one or more of the following 
methods. 
■ Change a mode setting of [Enabled].
■ Turn OFF the computer while external 
devices are connected.
■ Connect external devices after turning OFF of 
the computer.
If this function can not be still used, change the 
setting to [Disabled] and stop using this function.
The battery depletes 
quickly even when I 
turned OFF the power 
of the computer. 
When "USB Sleep and Charge function" is set to 
[Enabled], USB bus power (DC5V) will be 
supplied to the external device connected to the 
compatible port. If external device is connected 
to the compatible port when the AC adaptor is 
not connected to the computer, the battery of the 
computer will be depleted even when the power 
of the computer is turned OFF.
Connect the AC adaptor to the computer or 
change the "USB Sleep and Charge function" 
setting to [Disabled] or if there is a USB port that 
does not have the USB Sleep and Charge 
function-compatible icon ( ), use that port.