I received my Avalon boxes today, but one of them has severe problems:

All of them hash just fine at 300 MHz, but one of them only works if I set it to 256 (but still problems).

When it starts hashing, it will climb to about 66 GH, but then resets every 1-5 minutes, sometimes resets even quicker.

This box had an older firmware on it than my other ones. It had 3.1.1 instead of 3.2.1 (I think).

The temperatures seem to be pretty normal. But it just resets a lot. Sometimes it will not start again even if I stop and start the service, and I have to power off and on again.

What are some things I can do to troubleshoot the issues with this box?