Hi,
I bought several used miners Canaan Avalon 1047 and I'm facing several different problems, maybe somebody have more experience with them:

1. Some PSUs don't even start. Is there some known issue to check first?
2. On some the PSU is working, then I see them connected to the network hub but no DHCP working (no IP assigned, just device attached to 100MBps port of the network hub).
The miner's board is blinking white-yellow-green-red-red-red-red and again.
Tried to reset them with FUNC, pressing for more than 10 seconds at start - result is blinking white. But after the restart the same happens again - no IP assigned, no access to the miner and blinking white-yellow-green-red-red-red-red and again.
Tried to connect laptop via LAN cable (straight one) directly to the miner, no network hub. Configured the laptop network as specified to IP 192.168.168.100 and tried to access 192.168.168.168 (the miner in setup mode). Not successful.

I need to set them to DHCP operation in my network, how this can be done - how can I put them in factory default?

PS: there is no 12V to the hashboards (yet), but with no network set on miner probably this is normal.