Okay it failed again after a few boots and opening/closing the lid. Someone said that soldering with an iron will not work, it has to be reflowed with hot air due to paste under the chip.
So the 2 fixes that make sense, reflow with hot air and add a piece of rubber to give support to the max chip when reassembled, plus loosen the hinge to stop excessive flexing on opening & closing the lid.
Okay, did all of the above and it is working again, so far so good. I used a hot air gun on a low setting to reflow the solder. I will provide an update in a few days.