How to revive the stm32f4discovery board?

Question

ARM

Good afternoon!
The essence of the problem is this. At some point, I connected the stm32f4discovery board to a computer (mac os x), I try to flash it and I get an error

2016-03-31T11:09:50 WARN src/stlink-usb.c: Couldn't find any ST-Link/V2 devices

at the same time, everything was flashed
on the board before the st-link LED blinks red
Tried through windows 10 and the STM32 ST-LINK Util program the
same thing
No ST-LINK Detected
I connect boot0 + vdd and pb2 + gnd jumpers to enter dfu mode, on Windows the DfuSeDemo program is defined as a dfu device, I'm trying to upload the firmware, it's uploading, but nothing happens to the board, that is, I fill the blinking LED, it doesn't blink
On the poppy, I try to do the same, I get

dfu-util -d 0483:df11 -a 0 -s 0x08000000:1024 -D .../LED.bin 
dfu-util 0.8

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2014 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to [email protected]

dfu-util: Invalid DFU suffix signature
dfu-util: A valid DFU suffix will be required in a future dfu-util release!!!
Deducing device DFU version from functional descriptor length
Opening DFU capable USB device...
ID 0483:df11
Run-time device DFU version 011a
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 2048
DfuSe interface name: "Internal Flash  "
Downloading to address = 0x08000000, size = 43340
Download	[=========================] 100%        43340 bytes
Download done.
File downloaded successfully

as you can see, a dfuError error is generated.
At the same time, before these actions, the old firmware worked, although the ice of the st-link blinked red
. How can I revive the board? Or check where the problem is, the st-link is built into the board, there is no external

Answer 1

I somehow had a similar problem - the stem was lying around for half a year in a box, the X hour came, I wanted to pick it up, and I couldn’t flash it for several hours either, in the end it turned out to be stuck - the swd jumpers were not connected that way. Navryatli you have the same, but you never know.

Answer 2

Yes, there the slink failed, apparently, somehow killed him with static.

Answer 3

I had a similar situation, only with an external Chinese stlink.
After the next upload of the firmware, it simply ceased to be.
Is it possible to try to upload the firmware to it (suddenly, this is the problem)?

Answer 4

Just ran into the same issue. If (!) the firmware is not correct (in my case, port A was configured strangely).
The following helped. At the moment before the firmware, the reset button is pressed. Without releasing it, we give a command to the firmware (any other), and after a second or two we release the reset. There is a flashing. Helped me.