Ok thanks. It'd be cool to get a hex file made that could be used to reflash cards that have this happenbut I ordered a pickit3 since bitmain support was hung up on warranty status of my unit rather than understanding what happened or providing much help but we'll see. Supposedly my issue was being escalated although not holding my breath. lol  It seems the new "low power" T9+ firmware is built to auto-reboot if it doesn't find heartbeat of all 3 cards though which is very annoying when trying to test single boards..  I ended up tweaking the old available source a bit & running that with 1 working card for now. It boots up & mines WAYYY faster than the official version even when the cards were working. I do need to measure power usage at wall to see how much I'm losing out on vs the new low power version but that one won't run without all 3 working cards installed so can't test that until/unless I get my other 2 cards repaired.