please create a ticket at
http://bitmain.zendesk.com (top right)
or email a support request to support @ bitmain . zendesk . com
If support staffs are online, you may request to chat, too.
https://v2.zopim.com/widget/livechat.html?key=2ZaJsbRPVUUFCqOE8MmgXgbFFdNYxOBPwarranty is 90 days from purchase date. (Bitmaintech.com or Amazon seller "Bitmain") If you purchased it from else where, please email the proof of purchase in the ticket.
you can try updating the firmware to the most recent January one but before you do that, please power off your S3+ and let it sit for 10-15 minutes and power it back on. If the xx goes away. Often time, a few X's on the ASIC status comes from teh firmware bugs. But your hashing speed is low, too, so the problems could be on the hashing PCB.
What is the warranty on the S3+. I have one showing:
oooooooo oooooooo
---ooooo oooooooo
And only getting speeds of about 400.
I have a similar problem on a current batch S3. Mine displays xooooooo oooooooo on the first chain. on the plus side, now that the asic is dead the S3 runs abou 3 degrees cooler on that chain. I suspect the asic was overheating and eventually went dead.