Still having problems on one of my Avalon boxes. I've updated the firmware, disabled Wi-Fi, fuse is not present, ran at minimum 256 MHz, checked cables, and it still stops after mining for just a couple of minutes. Hash rate goes all over the place too. It eventually drops to zero and the LED stays yellow.
Any suggestions?
Try with only wifi, I had similar issue with one box, till I changed it to wifi with manual ip address and deleted lan.
But be careful, delete your lan after you're sure that wifi works flawless.
I would not delete LAN, its the backup if WLAN ist not working anymore.
I had also similar issue with my Avalon.
I deleted WLAN and configured LAN to DHCP. Then rebooted the Unit (Cold-reset).