How to unbricked a slim ps3 with blue screen without text?

Hi,

Please anyone can help me how to unbricked a ps3 slim - model CECH-2112B.


I tried to install SGK CFW 4.31, it bricked my slim ps3 but i have forget to enable toggle_qa.

Please any help, how to unbricked ps3 slim.

Best Regards,
Stephanehl