Received my 4 s3's 3 fire up fine, however 1 is displaying the following.
Ive swapped PSU's and cables
Opened up and swapped chain cables around and still only chain 1 fires up.
Anyone seen this problem and any advice?
Cheers

are you sure you have both sides of the miner powered?
you only need 2 plugs, but they have to be each side. not front and back.