Guys, do you have problems with any of your L3+ hashboards? Second hashboard shows different number of chips (2 or 20 but not 72) and has only "xxxxxxx".
Try to change the pool, that should solve that problem, you can change it again for your actual pool. Most of the time when you change the pool all the Hardware errors just clean to 0 and the infamous "xxxxxx" reset to "000000"