The issue seems to be USB related.
Is there enough power going to the ports?
What is the PSU wattage?
Generally factory built computers are under powered with the PSU's.
It seems to be more specific to a particular model (GX280). It would be interesting to find out if the PSU's and main boards are identical.
What are the voltages on the board?
Download and install PC Wizard 2010
Run the program and it will analyze your computer and then display the results.
In the upper left hand corner click on the floppy icon.
You will get a save as screen.
Change the range bullet "only this selection" to be "selected category".
Make sure that text is selected for format.
Click on ok and you will be given a spot to save it to.
Attach it to your response.