MarcinG

Ok,

The problem was Advanced USB Monitor and it's filter driver. After uninstall everything back to normal.

Ok,

There is something wrong with my PC. On another laptop I can deploy app.

Strange is that I can deploy for NP1 but not for NP2.

Thanks for all help.

I've done that. It's driving me crazy!

I've checked that if I erase in DFUTester and then upload there are FF's in Internal Flash.

After reflashing in DFUSE and then upload in DFUTester there is someting in Internal Flash - so reflashing works.

What should I have in: Option Bytes, OTP Memory and Device Feature??

Maybe someone can send me some test file(blinking led or somethig) file (in hex maybe), please.

But in my case I can't deploy anything, even after reflashing.

I think that somehow the board it's broken and I'll send it for replacement.

Or maybe some other ideas how to bring it alive??

Hi Chris,

Thank's for reply.

No - it didn't work on 4.2. So I decided to reflash firmware 4.2 and after that I upgraded to 4.3.

All the steps of reflashing/upgrading ended with "success " message.

Is it possible that board/stm is broken but somehow it passes reflashing without problems??