dell u2412m monitor usb ports stopped working????

I had this same monitor hooked up to my mini for a over a year. It worked fine as a USB hub and there were no issues. Did you try resetting the monitor or unplug for 5min? How about swapping the USB cable for another?

If neither of those work, it seems defective. It's not an issue of Mac vs. PC (but you could plug it into a friend's PC to check). If send it back is an option, and the above all fail, I'd return it. But, I'd get another 2412 because it's a great monitor.

dapitts08 said:

it is weird though because it seems like it is working but not pulling enough power. when i connect my ipad it charges for like 1 second and stops.

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USB spec is 0.5amp, which doesn't tend to work charging an iPad. If memory serves, iPad needs 1.0amp to charge.

There is a newer USB spec that will allow for higher output. Note that the wall charger is not a computer bus so the rules don't apply.

"it worked fine when i first got it last week but now when i plug up a device it charges for a second and then stops"

Operative word here is "charging".

Are you trying to use the ports on the monitor to charge a USB device?
Or… to just connect it?

A guess (and it's ONLY a "guess") is that the ports on the monitor may work in ordinary circumstances (that is, connect a device but not "charge" it), but may not supply enough current to actually charge a device that needs charging.

The Mac itself will automatically "disconnect" USB ports if an "overcurrent" situation exists (device attempting to draw too much bus power). I'm guessing that something like this is happening with the monitor's ports.

Solution (as mentioned above) -- plug the device _directly_ into the Mac's ports.