It bothers me though if it is safe to leave it for a long time unattended. I mean, can it possibly fail so badly that it catches fire and burns the apartment? Do you guys take any precautions just in case?
Once they zombie out I think they are harmless. Although I have had two molex plugs melted by a U3 and it wasn't even overclocked very high...
I didn't rely on the solid red LED up front because sometimes when it went zombie or simply went to a zero hashrate; the red LED was still lit solid....
Mine was pretty accurate with the red light.
Mine have also been accurate with the red led, it always shuts off when they zombie.
Also. Your miners are stupidly unstable. is there a firmware update I can do to make them stable? They can't even stay up a whole day with out turning into a zombie...
Welcome to the U3, this is how they operate. You'll be lucky if you can get more than 1 to work at once, also, good luck!