Updating 7820 and crash. HELP.

[ggauny@live.fr]

Hi,
When updating FW 7820, I had omitted to update Virtual Prime, so first blue line appears but at 69 % :" Failure... Retry 1..2..3..4..5" and stop.
Well I try once again but same thing "Failure ......", at this time i've disconnect the usb cable and the Prime became screen black, no response of key. Pressing "on" key had no effect. All manipulations like reset is no operating, like the batt is absent.
Fortunately I've a second prime, this time i'd update the Virtual 7820 and all was perfect.

Is my first prime definitively dead ? Is it a way to awake it ? I hope so, may be someone has a solution

Thanks in advance.

Gérard.