my board is unable to detect when I flashed it after that led is glow is not glowing plz help me

[HPunm.1]

earlier using st-link for debugging that time it was not showing anything on the display and the blacklight was also not flowing then using stlink utility flashed the board, now not is been detected so please me regarding this

[Piranha]

The guy took a nice working board and just destroyed part of it's main functionality just because of inability of reading the manual. This topic proves that the people, who cannot split their thoughts into sentences, not only are incapable of doing more complex things, but are even dangerous!

On the other hand, it's not clear why ST leaves the ST-LINK MCU without RDP level 2.

[HPunm.1]

These are electronics and these boards are very sensitive. And one thing no one wants to damage the board intentionally. While we are working on board suddenly we observed some miscellaneous action and we are giving our best to recover the board.

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[Tesla DeLorean]

Well 3-days in, and I'm not clear what you did to get it in this state. But using ST-LINK Utilities on an H7 and ST-LINK/V3 is probably one of the issues. The tool has be deprecated for Years.

Problem is you don't appear to have been cautious, and "tried everything" to the point now that the debugger has been erased, and that's quite a challenge..

I'm not sure there's an official recovery path from here. ST don't officially release the binary for the ST-LINK/V3 although you might find a copy online somewhere. It might be possible to find a CMSIS-DAP or Bla-ck Mag-ic probe firmware that works on it.