Default [Q] android robot lying down with exclamation mark on my galaxy s3 after unrooted

I unrooted my galaxy s3 yesterday and something might go wrong because the odin3 shows me a FAIL and a PASS. After that my phone works well with the new stock firmware, but i got the android robot lying down with an exclamation mark on it when i press and hold (Volume up + home button + power button). Can i know what's the problem? Its because the process of unroot went wrong or what.