ST-LINK stopped working. read Voltage = 0, ID can't be read out.

[RongShengWang]

Hi,

    I use Nucleo-H753ZI.

    I am using STM32CubeProgrammer. to debug mt ST_LINK, which stopped working.

    I read Voltage = 0, ID can't be read out. 

    How to fix it?   Thanks

[AScha.3]

Hi,

target at 0V , no power. 

So check, what you did...or "happened" ... is board powered? (no) Jumpers all there ? and have contact - check.

+

Anything connected to board ? remove it. check for short power-gnd.  (3v3 --- gnd)

[Tesla DeLorean]

Review the schematics, see CAD Resources tab on product page.

Trace power connectivity from ST-LINK USB to the MCU and point on card where the STM32F103 checks the voltage. 

Evaluate what you did with the board. Don't place on conductive surfaces. Watch for external electronics you've attached.

[Imen.D]

Hello @RongShengWang 

I recommend you check this article which describes tips to fix such errors encountered: 

How to solve connection errors when connecting and programming the STM32 target board

[Andrew Neil]

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@RongShengWang wrote:

    I use Nucleo-H753ZI.

    I am using STM32CubeProgrammer. to debug mt ST_LINK,

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Just to be clear: is that the built-in ST-Link, or an external one?

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@RongShengWang wrote:

    I read Voltage = 0,

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What makes you think that is due to a faulty ST-Link?

As the others suggested, have you checked that the the supply voltage is actually present, and that it's reaching the ST-Link?

Many Nucleo boards have various power supply options, some of which render the ST-Link unusable. Check the User Manual for details.

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@RongShengWang wrote:

ID can't be read out. 

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If the ST-Link can't see any power on the board, it won't be able to do anything with the Target!