You need a CH341 programmer, dump the content of the firmware chip and attach it / post it so that someone might have a look into the firmware to see if the firmware really is the culprit and if that’s so how to fix it.
You need a CH341 programmer, dump the content of the firmware chip and attach it / post it so that someone might have a look into the firmware to see if the firmware really is the culprit and if that’s so how to fix it.