I'm having an issue that I'm wondering if anyone has seen before. I ordered 2 R4s in January and set them up on my local network monitor which I guess gave me a false sense of security because they've both been live on the network but apparently one stopped working some time ago.
When I logged into it the GH/S(RT) said 0.00000 and one of the boards has no temp info. I tried a software restart a few times to no avail and after cycling power I now get one board running and ~4.7TH/s so half output.

Has anyone seen this before and found a fix? Trying to upload the .tar.gz for R4 firmware from the antminer site fails.
I have 3 days left until I'm out of the 90 day warranty window expires but shipping this thing to china seems like a bit much.