Had the game blackscreen in the website, so I refreshed. doing so with a heat value seems to cause everything on the board to expload as if you overheated.
IE, have a max reactor heat of 3K and a current heat around 1000, refresh and everything will be wiped.
My first blackscreen occured when I was playing with heat transfer between pipes, outlets and fan's with just a few rods and a reactor temperature over 6000 of 10500, one of my heat outlets maxed out and it just black screened within 10 seconds of seeing that (The component did not break, the bar simply filled), during which I was adding more pipes to the mix.
Bottom left of reactor had (I was adding components then it occured):
Black space = B
Heat outlet = H
Pipe = P
Fan = F
was modifying from (To experiment):
BFFF
HPPP
BFFF
To:
FFFFFF
HPHPHP
FFFFFF