[Phalanx]

Just to add a little bit of information as to what happened with us 1089.
I apologize up front for the length of this post....

We ran all day Friday fine, and most of the day on Saturday until we experienced this problem. I'm still not 100% sure what the root cause was, but it is my belief that a combination of Low Classmate battery, 2 Joysticks, PSOC (4 buttons box) and the USB hub all being powered by a single USB port caused the USB port to not be able provide enough power to drive everything needed. This caused the joysticks to not respond and hence unable to drive, even though some buttons worked.

Connecting the RED and the BLACK connectors as a triage stop gap idea from the USB hub to two ports on the classmate cleared the problem. This solution for a short explanation allowed power to be drawn from BOTH ports to cover the power requirements of the attached devices.

Looking deeper into this issue, I've come to the conclusion that for some teams it may be wise to balance the load from your controls between the two USB ports on the Classmate. Some other Joysticks have a higher power requirement than those ATTACK-3 provided in the kit.

I do not yet have the milliamp draw numbers for the ATTACK-3 joysticks or the hub, however the PSOC is capable of drawing up to 400mA. The PSOC is divided into quadrants each able to source 100mA.

Given that a USB port can provide up to 500mA total, it could be very possible, that a combination of PSOC, higher powered Joysticks, hubs, etc could exceed the available power on a single port.

That's the best theory and explanation I have for what is happening.