Samsung Galaxy S3 — PLS HELP - FROZEN s3 19GT-19300

Hi everyone,

I'm new to this so sorry if its a stupid question.

I have upgraded my mother from her Samsung galaxy s3 19GT-19300 to find she hadn't backed up anything - MAINLY contacts!!

The thing has Frozen, all that comes up is the 'Samsung s3 Start up' OR an EMPTY battery sign.

The battery is fine, but I can't seem to 're-boot' it.

I've tried a few suggestions found on you tube/net eg. holding top (or bottom) vol button, home & power at the same time - BUT NOTHING.

Can ANYONE PLEASE HELP ME!! It would be GREATLY APPRECIATED!!
(and stop her nagging!!)

Thank you,
Jaci