After 2 months of mining the most time the L3 worked without faults, just one time it dropped 1 hasboard but after the reboot it came back for regular hashing. Few days ago the miner crashed and when I checked the miner status I noticed that the board2 loss 4 asic chips, and I was surprised that this was not hashboard3 that always generated a lot of HW errors. At this time I can't get 4 asic chip to come back up even after the reboot. I contacted Bitmain and they confirmed that the repair cost is around 35 USD for each board without warranty, plus shipping cost. I'm going to create a repair ticket and ship the hashboard back. I just hope to get help from Deep In The Mines to create a return label with their discounted shipping rate.
I noticed that the hardware defects are starting to appear after two months of use and the example is my L3 and two L3 from Longsnow.
Anyone minnig more than 2 months without serious issue?