gerotmf

Change usb cable first. Had similar problems with one of my pi4s .. and it was new cheap chinese cable. Also check dmesg and see if there is something with usb logged there lile recconect or disconnect msgs. Sent from my SM-S901B using Tapatalk

Yes, that's why i think it's gone. It was finicky from the box. The other one - i have 2- is ok. So far. Sent from my SM-S901B using Tapatalk

@jock well tv box was acting up from the start (had to reflash original android rom from the start) , i've also tried 333Mhz idbloaders from the link you posted (sd boot into clean armbian, backed up original, dd to sd card, erased flash beforehand so that it will boot it).. but that killed the box .. like completely, now it doesn't even go into maskrom mode (av port button and usb a/a cable in usb2 port). I guess i can close this case it is weird though, the second box i bought for a friend, works ok.. although i must recheck that now, maybe under load it will also crap on me.

@jock Thanks for the answer, i did catch this at some point, but it's not the same every time