Chapter 5. Troubleshooting

The connected external

Do not connect or disconnect any external device

device does not work.

cables other than Plug and Play (PnP) device while

 

the computer power is on; otherwise, you might

 

damage your computer.

 

When using a high power consumption external

 

devices such as an external USB optical disk drive,

 

use external device power adapter. Otherwise, the

 

device may not be recognized, or system shut down

 

may result.

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Lenovo U150 manual Connected external