Hi! I am a newer, from

I have SC620, I tried to update firmware with isdt sclinker.
However, during update process, update process screen locked never reboot again.
I waited last screen for 5 min. nothing reboowas happend.
I tried to reconnect power line. no lcd screen and only beeping sound is continuing.
I tried to connect sclinker to SC620 and update firmware, but no port found sign was comming.

How to solve this problem.... Please help...

I have personally not experienced this issue, could it be TX or RX cable got loose during the firmware update? So you can try to reflash the charger?
Anyway I think you need to contact the seller or the company to get real technical support...