pipneogen Well, this screen is normal. Long keep and not necessary.
And in general, the strange behavior of a smart or PC (I still do not understand which of them drives).
Phone: In the recovery enters, in the firmware mode enters. Che him still need, it is not clear.
PC: sees in the same position (and incorrectly).
I can only offer one, first with the same wire, try on another PC to connect (and I think that it will not be superfluous if there is another OS, 8K or 7K, and even xp).
Then change and wire.
If not to decide on the PC, then no matter how to carry it in the SC and the programmer to revive (it is impossible to sin on USB in the phone, since it is still determined).