STlink-V3minie stopped working

[Mrquokka]

Hello!

I was working on a project of mine and put it on pause for a few weeks and now when I tried to connect the stlink to my PC its no longer detected. 

Its not showing up in the device manager and the stlink has dim red and green lights lit.

Does this mean that it's somehow bricked? 

What could have caused it?

I tried it on two of my computers and with 3 different cables. I am assuming it's a different problem from this one https://community.st.com/t5/stm32-mcus/how-to-solve-connection-errors-when-connecting-and-programming/tac-p/786977 .

Thanks in advance!

[TDK]

Dim LEDs generally indicate a hardware issue, yes.

Overvoltage conditions can break the board. I'm not saying that is what happened, but it's possible.

Dropping something conductive can short 5V to pins that don't allow it.

If you have electronics debugging skills, use the schematic to trace where power is lost.

[Mrquokka]

Hi!

Thanks for the reply. 

I was able to confirm that 3.3v is on the board but I was not able to find the schematics of it on the product page. Is there some other place where the schematic is?

There is some life on the board function wise as well. When I connect it to my project then my board resets and when i connect the usb to the stlink then my project stays under reset. The red led pin has about 1.5V to it measured by a multimeter so I am assuming its some sort of pwm or the board keeps reseting.

Thanks!

[AScha.3]

Hi,

afaik there is no circuit avail.

Without target, just the miniE, to USB : happens anything ? enumeration ?

[TDK]

Oh, I thought this was a nucleo board initially, not a standalone programmer. There are no schematics available for the standalone programmer.

Remove your target board from the equation, is the programmer detected?

The programmer doesn't provide power. Is your target board powered?

[Mrquokka]

I tried all different configurations.

With or without a target board and no detection on windows side. 

Is there any way to try reflashing the stlink via another stlink? I think I can borrow one from a friend. I am assuming the pads that are under the board sticker are used for that in the factory.

[TDK]

No, the firmware is not open source. Even if you could, flashing won't fix anything if the hardware is damaged.

It sounds like it is damaged and will need replaced.

[Pavel A.]

Just checked the ST store ... Surprise!  STlink-V3minie out of stock :((  and price almost doubled.

[TDK]

80 available at DigiKey. Price is $25, used to be $10-15? Kind of ***py. Wonder why.

[johnbeening]

You should check whether the hardware interface circuitry on the circuit board itself is functioning properly.