Stm32F407G-DISC1 problem

ive got the strangest thing…

i have three boards..one is a older discovery board witch is in my midibox SEQV4

the two other are new one from mouser (STM32F407G-DISC1) they are programmed with the same bootloader and latest seqv4 0.91 software…the older works fine but the new ones do not work…

the problem is …

when i power it from the micro usb…it does not show anything in the displays…but when i it power from the mini usb …it does work

(the core board with the cardreader are both the same and work fine).

 

what can this be ?

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This should really be added to the uCapps info when TK. has a chance.