My QUAD appeared to be locked up. It would not ping and my two PC's could not see it. I tried using the power button but it would not shutdown. I pulled the power and now it won't turn on. The green light on the back is lit. I tried holding in the power button for 10 seconds and nothing will turn it on. The switch in the back is on manual. I also tried auto. I pulled all 4 hard drives and it still won't turn on. I also power cycled the power supply which has a green LED and is on.
If the unit is not powering on it's possible the NAS experienced a short when it locked up. If you're located in the US I would send an e-mail to info@buffalotech.com requesting an RMA.