My MG5320 does a power down by itself on a regular basis, perhaps minutes or a hour after it's been powered up. Strange problem. It is connected via USB and has WiFi connectivity. I use it primarily with the USB connection to print from my desktop. After working at the desktop for perhaps a hour, I request a print. An error pops up that says the printer is offline. I then power it up, and it prints. After working perhaps another 30 mins to an hour, the same scenario occurs.
