Updated my 998 now that I have my boat back, and did like the directions said to do on HB website. Reset unit to default settings and so on, then inserted the SD card like always, and went through prompts to update to newer software, and then blackness. No picture any longer of any kind. Killed the power to the unit, turned power back on, hit power button on unit, one little blink and nothing. Have tried for an hour to get it to turn on.

Have no idea what went wrong on this update, never had a problem before.

Any advice?

Thanks