No power through usb. STM32F103c8t6

[J_Molenaar]

Dear Folks,

I have a problem with my STM32F103c8t6 black pill, yesterday i had power over usb and programmings worked without a flaw.
But today it isn't working anymore, i saw some smoke in the corner of my eye just flying by.
What could this be? Becuase when i power it from my usb to tll converter over 3v3, it works without a flaw.
Can it be the 5v to 3.3v onboard regulator?
When i have connected the usb to the STM32 it can upload, but only if i gave it some external 3.3v power.

Someone knows what this could be?

Best wishes, Jeff.

[GonzoG]

Looks like regulator got fried.