All this didnt work... tried it all....Do you have a Quad or a single?
Try to do the following:
1.power off all the boards
2.remove the power connector
3.remove the sd card ( location: the SD card is already included in your miner, you'll find it in that small board ( where the ethernet cable enters ) beneath the main big red board )
3.1 if you have a Quad try removing all the cables that connect the boards and insert them back in.you should have also a spare cable of this type, try and replace the cables from the board that blinks blue
4.insert the sd card back
5.insert the power cable and power it on.
If the above does not work try and connect another power supply.In my case a 12 V 4 A power supply from an external HDD did a good job.
Let me know how it works out as I have a few more thoughts on what you could do.