HP LaserJet Enterprise MFP M725 series User Manual
Page 308
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4.
Make sure that you do not have too many USB devices drawing power from the chain. Disconnect
all of the devices from the chain, and connect the cable directly to the USB port on the computer.
5.
Check to see if more than two non-powered USB hubs are connected in a row on the chain.
Disconnect all of the devices from the chain, and then connect the cable directly to the USB port
on the computer.
NOTE:
The iMac keyboard is a non-powered USB hub.
294
Chapter 10 Solve problems
ENWW
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