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As Sushi nor Bitmain wont help me although I wrote them several times (Ordered over 30 S1 from them !!!) but no response, god forbid help from the.
I will copy/paste system Log if anyone can help:

Fri Mar 21 13:50:46 2014 kern.err kernel: [  287.630000] hub 1-1:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
Fri Mar 21 13:50:46 2014 kern.err kernel: [  287.640000] hub 1-1:1.0: cannot disable port 1 (err = -71)
Fri Mar 21 13:50:46 2014 kern.err kernel: [  287.650000] hub 1-1:1.0: unable to enumerate USB device on port 1
Fri Mar 21 13:50:46 2014 kern.err kernel: [  287.660000] hub 1-1:1.0: cannot disable port 1 (err = -71)
Fri Mar 21 13:51:01 2014 cron.info crond[576]: crond: USER root pid 1144 cmd /usr/bin/cgminer-monitor
Fri Mar 21 13:51:52 2014 kern.info kernel: [  353.410000] usb 1-1: USB disconnect, device number 24
Fri Mar 21 13:51:53 2014 kern.info kernel: [  353.710000] usb 1-1: new full-speed USB device number 29 using ehci-platform
Fri Mar 21 13:51:53 2014 kern.err kernel: [  353.930000] usb 1-1: device descriptor read/64, error -71
Fri Mar 21 13:51:53 2014 kern.err kernel: [  354.250000] usb 1-1: device descriptor read/64, error -71
Fri Mar 21 13:51:53 2014 kern.info kernel: [  354.480000] usb 1-1: new full-speed USB device number 30 using ehci-platform
Fri Mar 21 13:51:54 2014 kern.err kernel: [  354.700000] usb 1-1: device descriptor read/64, error -71
Fri Mar 21 13:51:54 2014 kern.info kernel: [  355.140000] usb 1-1: new high-speed USB device number 31 using ehci-platform
Fri Mar 21 13:51:54 2014 kern.info kernel: [  355.180000] hub 1-1:1.0: USB hub found
Fri Mar 21 13:51:54 2014 kern.info kernel: [  355.180000] hub 1-1:1.0: 2 ports detected
Fri Mar 21 13:51:54 2014 kern.err kernel: [  355.280000] hub 1-1:1.0: hub_port_status failed (err = -71)
Fri Mar 21 13:51:54 2014 kern.err kernel: [  355.290000] hub 1-1:1.0: hub_port_status failed (err = -71)
Fri Mar 21 13:54:01 2014 cron.info crond[576]: crond: USER root pid 1221 cmd /usr/bin/cgminer-monitor
Fri Mar 21 13:56:00 2014 kern.err kernel: [  601.110000] hub 1-1:1.0: activate --> -19
Fri Mar 21 13:56:00 2014 kern.info kernel: [  601.110000] usb 1-1: USB disconnect, device number 31
Fri Mar 21 13:56:00 2014 kern.info kernel: [  601.240000] usb 1-1: new high-speed USB device number 32 using ehci-platform
Fri Mar 21 13:56:01 2014 kern.err kernel: [  601.780000] usb 1-1: device not accepting address 32, error -71

Kernel Log:

[  660.480000] hub 1-1:1.0: cannot reset port 1 (err = -71)
[  660.480000] hub 1-1:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
[  660.500000] hub 1-1:1.0: cannot disable port 1 (err = -71)
[  660.500000] hub 1-1:1.0: cannot reset port 1 (err = -71)
[  660.510000] hub 1-1:1.0: cannot reset port 1 (err = -71)
[  660.520000] hub 1-1:1.0: cannot reset port 1 (err = -71)
[  660.530000] hub 1-1:1.0: cannot reset port 1 (err = -71)
[  660.540000] hub 1-1:1.0: cannot reset port 1 (err = -71)
[  660.540000] hub 1-1:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
[  660.550000] hub 1-1:1.0: cannot disable port 1 (err = -71)
[  660.550000] hub 1-1:1.0: unable to enumerate USB device on port 1
[  660.560000] hub 1-1:1.0: cannot disable port 1 (err = -71)
[  660.570000] hub 1-1:1.0: hub_port_status failed (err = -71)
[  906.280000] hub 1-1:1.0: activate --> -19
[  906.280000] usb 1-1: USB disconnect, device number 43
[  906.410000] usb 1-1: new high-speed USB device number 48 using ehci-platform
[  906.660000] usb 1-1: new high-speed USB device number 49 using ehci-platform
[  906.900000] usb 1-1: new high-speed USB device number 50 using ehci-platform
[  907.150000] hub 1-1:1.0: USB hub found
[  907.150000] hub 1-1:1.0: 2 ports detected
[  907.350000] hub 1-1:1.0: hub_port_status failed (err = -71)

On Miner Status  get 0.00 GHs speed

Check wiring from hashing boards to the control board.  It seems like there could be an issue there.  disconnect and reconnect the cables.  Also try a new power supply if you have not already

Firstly thank you for trying to help. I have tried switching cables (all combination), tried switching PSU's, all 3 available firmwares, nothing. Strange thing is if I leave it switched off for 30 min or more and turn it back on for some 5-10 min it hashes normally until the errors come again. My guess is that control board is faulty and I cant do anything to make it work!

And I did tried running only one blade each time, but no go!

You tried running each blade separately and it does not start you mean?

Tried another control board with the same wiring and blades?



.

try underclocking it to freq 325

 I have 4 of them and one is flakey but works wonderfully at freq 325.  only gives 165gh,but still good.

Yes I tried each blade separately and it wont start.

I tried underclocking, still no go!

Try swapping the control board from one that works.

It sounds like the control board is overheating.

Is this all 30 of them acting up the same way?

no, only one!

Your looking in the wrong area.  Check your cards for cold solder joints.   
Symptoms you describe are indicative of this....  "leave it switched off for 30 min or more and turn it back on for some 5-10 min it hashes normally until the errors come again. "
Your ciicuit simply Heats up then errors begin because of the added resistance from the cold solder joint.

Cold solder joint looks Dull compared to a normal solder joint.  Sort of like a stainless steel mirror looks compared to a glass mirror.  (best analogy I could think of)

Anyway If your not sure what you are looking at, take a solder iron and touch\heat up each and every joint so they just melt and then solidify again. (They should look shiney) This will likely fix your problem.
Do not add additional solder and be careful to not burn the board. Have the board laying flat when you do this.  A 25 watt solder iron should work for you;  one of those big soldering Guns might be overkill.