Black Screen after (offline) Firmware update

[Aspart4m]

Hi,

i followed the instructions from this thread (How to Update).
everything works fine until the reboot. after press Reboot now! the screen turns black and nothing happens.

Firmeware 7.0.7 to 8.1.0

i'm using sx pro with asx os 2.8 Beta

Battery is full

holding the power button 15/20 sec, hold volume + and power, with dongle / without dongle, with sd card / without sd card, with this little thing on the right joy-con / without - nothing happens


so what now?
I found the solution, the dongle only needed some power from a usb

 

[ybmug]

Hold power on switch for 15sec to shutdown. Afterward, put your switch on the TV dock. Charge your SX dongle via PC. Remove Switch from dock and SX dongle from PC. Put dongle on Switch (and jig if no auto RCM). Hold vol+ and power until in SX boot screen. $$$ if it worked.

 

[Aspart4m]

charging the dongle was the solution.

thanks