"No STM32 target found"

[DKim.35]

Hello everybody.

I use the STM32F746G-DISCO board. I checked all LCD operations using TouchGFX, but at some point, nothing appears on the LCD screen even when I connect USB to the computer.

When connecting using STM32CubeProgrammer, only the phrase "No STM32 target found" appears and it is confirmed that connection is not possible.

I tried connecting by changing the USB, and tried connecting while pressing the reset button, but the result did not change.

What should I do to solve this problem?

[MM..1]

Check powering jumpers on disco

[DKim.35]

I solved it.

I checked the power jumper and it was badly connected. It was a stupid mistake, but I fixed it thanks to you.

[AScha.3]

not clear:

board + connection was working

or

it is new and never worked ?

[DKim.35]

The board has been working fine for about 3 weeks since I bought it. But since then I have confirmed that it is not connecting.