I am so furious with this R4 situation.  I ordered 2 R4's B6 and out of 2 I have 3/4 boards running.  I had my brother that works for a huge company that ships BOOKS worldwide get me a quote to send back the r4.  OVER 300$  now let us not forget down time.  They expect us to PAY for return shipping of the defective unit?  NEVER in my life have I dealt with a company that would expect you to pay 300$ for shipping a 24hr defective product back to china!  There has to be a better way.  I am reading the beginning of this thread again and again thinking I am missing something, but the only thing that comes to play is the fact that these machines take a long time to come up anyway.  Is there any truth to the fact that the unit could "self heal" by reprogramming it's own Pic chip?  It sounds a little far fetched to me.  However, being a team player, I will waste 2 hours AGAIN on my machine to see if there is any truth to that.  I also read that someone copied the pic from a working board and duplicated it to a non working board.  That is all fine an dandy, however I can't imagine Bitmain being that ignorant as to not copy protect the data on the pic.  I do have a pic programmer *being an old PlayStation 1 mod chip installer! LOL

If anyone has ANY insight in to this situation feel free to message me and discuss.  I also have a friend that has 3/6 bad R4 B5  This is FAR from acceptable.

Thanks for tolerating my RANT!

Boomin