Using the 3400 alternate paper feed (drop down front tray) and network connection (ethernet, IP address) with a Mac (OS 10..4.11). On sending a print job, the printer hangs up (all 4 lights on) and does not seem to be waking up from power saver mode. Manually turning power off and on will temporarily cure the problem, until it goes to sleep again. This did not happen with the main paper tray - which is not being used because of a paper path problem.