Got my second AntMiner in today. Gotta say im not as impressed with this one. First thing I noticed was the thermal paste oozing out of the screws, a lot of it. Next was the fan. As soon as I plugged in the AntMiner the fan wasn't working and was giving off a burning smell. Ok, replace the fan and move on. Once fired up the I programmed it with no problems and set to mining. Then I noticed the green light on the left was flashing considerably slower than the one on the right. Checked the hash rates and sure enough 115 gh/z 
Of the 4 "sets" of chips on that side. 1 is working. The other 3 either have all x's or all but 1 or 2. Those chips are not even getting hot. Any ideas?
Of the 4 "sets" of chips on that side. 1 is working. The other 3 either have all x's or all but 1 or 2. Those chips are not even getting hot. Any ideas?the thermal paste is a definite issue of theirs - I agree. use a few q-tips and 99% rubbing alcohol and it cleans away like new
The fan on some of the new ones won't click on until the miner begins to hash. My assumption is they changed fan model and it requires a slightly higher minimum speed voltage to start. At least 1 of my recent antminers did that - I didnt pay close attention to the others though.
whats your power supply? that's a symptom of not getting enough 12V power to the board and can happen if you have less than a 550W rating on a single 12V rail. Otherwise, rebooting the miner (with a 2-minute cooldown time) should get the chips running again
Im Running a 850w Seasonic X-Series. The fan didn't even try to spin up and smelled like an electrical fire as soon as the machine powered on. I replaced it with a new 120mm fan from my stock. I got all the thermal past cleaned up.. That is some really runny thermal past. I will give the cooldown idea a shot. I did some testing with my fluke and found that the volt regulator on the middle to has power but is not outputting voltage on the other side. The fact that the last bank of chips is working at least give me a good reference.
