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not support UEFI boot, set Boot Mode to Legacy Support. If the device still does not appear in the boot
device list, replace with a new device or medium.
The connected external device does not work.
• The external device is connected by USB cables while the computer is turned on; otherwise, your
computer might be damaged.
• When you are using a high-power-consumption external device such as an external USB optical drive,
ensure that you use the power cable that comes with the external device. Otherwise, the device might not
be recognized, or the computer might be turned off.
For more technical support information, go to: