earlier I flash raceflight using dfuse and it work properly. After that I trying to reflash raceflight and it started have this problem. Im still using the same method dfuse to flash raceflight. However, after finished upgrade, and replug - in USB, it just have the constant green led, and com port doesn't show anything, until i shorted SBL and it still in DFU.
Any idea how could i solve this problem? thanks