1
0
I have a Dell OptiPlex 960. If I plug in three USB devices (keyboard, mouse, and printer) all to three USB ports next to each other (there is a row of four and a row of three on the back of the computer), it will not power on and the power button will flash every second and the computer powers on for about 1/4 of a second for every second.
However if I plug in two to the bottom row and one to the top row, it turns on fine. Is this because maybe one row cannot handle the amount of current to all those USB devices or is this a bigger issue?
I had a similar experience. I solved it temporarily by removing the power to the USB hubs. Powering the USB devices themselves (the ones that could) was OK. But I will have a problem the day when I need to connect a device that draws too much current and can not be powered independently. – Peter Mortensen – 2015-07-30T19:12:04.537