yeah I really haven't touched this since my initial investigation when I got it in.
basically the "leaf springs" that hold down all of the black heatsyncs with the temp monitors had lost all of their tension and the thermal compound had turned to dust on all of them too so none of them were making pressure against the chips and were just flopping around.
I did some searching for some replacement springs but couldn't find anything.
honestly if the temp monitors are there to shut down on overheat then they really f-ed up the design because if the springs or the thermal paste fail then the CPUs will cook themselves without the temp monitors even realizing it. could be why all these things are dead.