Monoprice i3 is stopping mid print, tried removing usb reset jumper, stopped mid print anyway. it was very warm control box, thought I might have smelled something… soldery-ish…
I think my solder joints on the power connectors may have flowed powering the heatbed up to ABS temps, and now its loosing power from that randomly and repeatedly… gota take apart the control box and maybe resolder.
My best guesstimate from the threads seen in the past on this topic. More research in order now that its my problem too. This takes away my high temp printing till its fixed 
I’d put my money on a burnt-up terminal. Tinned tips on stranded wire + marginal terminal sizing = late-life thermal runaways as oxidation slowly builds up.
Could be other stuff, but terminal failures are a very common problem.
@Ryan_Carlyle Update. The brilliant minds at Monoprice used excellent terminals that plug into sockets, really nice looking. The solder is not excessive but looks very well done…
Then they HOT GLUED them in place, after they plugged in the expensive new terminals and plugs… WTF??? The Heat Bed hot glue blob is melted down into the plug. Seeing if I can clean it out with a heatgun now, but sheesh this is a ‘fix’ done twice, once sourcing a truly awesome looking terminal and socket combo, then hot glue put on it to make sure it fails when it gets slightly warm trying ABS.
TAPE, DAMMIT!
Oh but the assembly line manager saved a cent per unit with hot glue as a consumable and probably got an effing bonus! Or something, not sure wtf really. Who would put hot glue on a terminal for a heatbed?
Engineering to Design to Assembly, so much gets effed up!
Update 2: Ryan you were correct, terminal screw at PSU ground was burnt, 2 prong connecter nearly gone everything oxidized total mess. Clean connecter plate with file, sandpaper down to 400, and vinegar? Rewire with clamped strands? Sound good?
You have a soldering iron, right? If I were you, I would either solder the PSU wires directly to the board, or get some higher-amperage rated screw terminals than stock. Cleaning up the existing hardware will often lead to another failure later because they’re so borderline on current capacity once you factor in suitable de-rating for conditions.
@Ryan_Carlyle Its the screw terminal on the PSU that was damaged, looks like the damage initiated in the crimp to the 2 prong flat screw terminal connector which is the most damaged. Posted picks in G groups Wanhao section.