Yes i think its a problem of the current supply.
Are you sure you have connected the cable right and didn't invert plus and minus? Inner terminal should be positiv and outer negativ.
I hope the other 2 cables aren't (black, red) leaky!?
Have you possibility to solder the 2 cables (yellow, black) from the 4 Pin-molex connector directly to the board?
I soldered the 2 cables directly on the board, paying attention to polarity.
Song didn't change, here's what written on console (usb cable)
set difficulty 512
mining notify: job_id '2bc700f5' coinbase 118+228 ntime 1388793564 merkle 10
set difficulty 20
mining notify: job_id '2bc700f6' coinbase 118+228 ntime 1388793594 merkle 10
mining notify: job_id '2bc700f7' coinbase 118+228 ntime 1388793596 merkle 7
can't close() in state FIN-WAIT-2
can't close() in state FIN-WAIT-2
mining notify: job_id '2bc700f8' coinbase 118+228 ntime 1388793654 merkle 8
mining notify: job_id '2bc700f9' coinbase 118+228 ntime 1388793684 merkle 8
mining notify: job_id '2bc700fa' coinbase 118+228 ntime 1388793714 merkle 8
PHY ID 20005c90 MAC 023d
mac: 78-dd-d6-24-02-3d
S-HASH 9
switching to pool 0
initializing bitfury
chip init 0
chip init 1
chip init 2
chip init 3
chip init 4
chip init 5
chip init 6
chip init 7
chip init 8
chis-hash > web server on port 80
miner waiting for IP address
p init 9
chip init 10
chip init 11
chip init 12
chip init 13
chip init 14
chip init 15
init DHCP
DHCP ready 0
Hostname shash023d.local
Full duplex 100 Mbps
then it starts over from the beginning.
Any other idea accepted...