No, It does go black for at least a few seconds (can't remember exactly how long). Maje sure you leave it during flash as it can take many minutes in fact they warn first boot if takes longer after reflash.
Good luck no matter what?
Thanks. I gave it plenty of time. It wasn't doing anything.
Yeah, it shouldn't take more than 15 minutes to finish the reflash process (and maybe(?) that long to start after the flash is complete?). You have at most 3 seconds after it turns on to make sure you've hit the shoulder button to reflash it.
It is really hard for me to even get to where I can boot off the SD. Most of the time I can't get it to power up at all. If I do get to the boot options usually it crashes before I even get to select 'boot from SD1'. Only twice I thought maybe it was going to reflash, but I literally get 1 or 2 seconds of scrolling text and then nothing after that.