OK, will do... They are disconnected now...   I examined the boards. Old ones are v1.1 the new ones are v1.4... Also the layout (and circuitry) did change !   It seems that (if I'm not mistaken) in VCCIO 3.3V/1A circuitry Q11 is gone and there are changes in U55, U7, U4 voltage regulators...   Attached images of related portions.     v1.1 boards   v1.4 board (problematic one)