Earlier I noticed one of my miners, a Z9 mini, had dropped so I headed over to my mine to check it out. When I got there I noticed the miner was completely off, no lights, but the PSU fan was still spinning. I figured it was probably just a bad PSU so I went ahead and replaced it with a spare and set everything back up again to test. As soon as I plugged it back in, flames, sparks and smoke started shooting out the back of miner. It looked exactly like someone had lit a sparkler. I was able to unplug it quickly enough before it got any worse or anything else got damaged.
Ive always been a little paranoid about a fire happening at my mine and this kinda shook me a bit. Not too long ago I bought these exploding automatic fire extinguisher balls and mounted them around my mine as a last resort incase a fire ever did break out. Im lucky it happened while I was there to quickly respond to it, otherwise I can imagine how things couldve gotten out of control.
Im not sure what caused the short but Im guessing it might have shorted out originally and when I replaced the power supply and powered it up again it started to spark and burn.
I took some pics of the damaged board. I lost 2 boards in all.
https://imgur.com/gallery/8U7pnlnI did some googling and found one other case of this happening. Looks like it also shorted in the same location on the board as mine did.
https://thebitcoin.pub/t/z9-mini-burst-into-flames-fake-bitmain-warranty-poorly-built-hashboards/48430Anyone know of any other cases where this has happened? It has me a bit worried about my other Z9 mini's and whether there is a defect in the board design itself.