USB error -32 seems to be related to unstable or low power situation, other sites recommend adding a powered hub. If one is built into your printer, check that it still is powered.
USB error -71 is likely an initialisation error as a result of the power fluctuation.
Another suggestion I found elsewhere was to completely depower the system, remove the USB devices, reboot and try plugging them in one by one.
I hope that helps.
