Matrix Audio element-H User Manual page 9

Precautions:
Some USB devices do not use the power supply from USB port, but it does not mean the bus power
supply could be unplugged, or it will cause the USB devices to malfunction.
Please disconnect your USB device before you change the power supply mode of element H. If you
switch the power supply mode when device is connected, the USB bus power supply surge may cause
the device to malfunction.
When the USB port does not work properly, please check the following items:
Make sure that the card is properly installed in the PC chassis and that the driver is installed correctly,
the hardware device is visible in the Device Manager after the driver is properly installed.
Use the internal power supply, please ensure that the SATA_15Pin connector on the end of the card is
properly connected to the power cable in the PC chassis.
Use an external power supply, please ensure that the DC input jack on the rear panel of card is proper-
ly connected to the external power supply and within the appropriate voltage range.
Make sure that the power supply mode switch on the rear panel of the card is in the correct position,
set to "INT" when using internal power supply, set to 'EXT' when using external power supply, and
'OFF' when no need power supply.
USB power supply settings
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