Devo 8s over voltage input cannot power on

mangmeephol wrote:

This is my reg. 5v.to 3.3v. But 800ma.

Yes that is the one but it must be 3.3v

800 ma is good

Stm32 can change for repair?

It depends how many other components are damaged. To much damage it is not worth it, good for trash or maybe some spares.

One more questions. If change stm32 must do program or must what how to other do more?

Yes will need to be programmed.

If you read other links you will see at least one other person who connected 3s lipo also fried rf module. If you fried reg and mcu (STM32) there is every chance you also fried rf module, flash memory maybe touch screen controller and other parts.

I sure hope you didn't and changing out reg fixes it.

FWIW I do have ST-Link programmer for installing bootloader, and can upgrade to Deviation etc.