Satellite M300: speach recognition works only with external usb hub

Hi All
I have the Satellite M300 which I was able to operate the speach recognition program prior to having the motherboard replaced due to the usb's failing.
I have found using the headset I cannot achieve high enough quality to operate it.
The only way I can operate the speach program is use an external usb hub with its own power supply.
Would the problem relate to the audio card or just simply not enough voltage?
And is there na fix?
Cheers
Craig

Hi
The notebooks USB ports provide a standard power of 500mA.
As I said this is a standard but in different cases the external 3rd party USB devices need more power.
For example one of my external USB 2.5 HDDs must be connected to two USB ports at the same time to ensure that the HDD would get enough power to work properly.
Your external card is not known to me but possibly it needs more power as usual.
Greets

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