A friend Galaxy SII (Koodo, same model as TMo) suddenly refused to boot up. When we power on, it shows the Koodo logo for a brief second and then the screen goes blank. It continues to buzz every second or so but never actually powers up.

I've tried pulling the battery and reseating it, and I'm doing this with it plugged in, in case there's a battery issue. Nothing seems to help.

Is there any likely solution, even if just long enough to back it up and/or get contacts and photos off it?