Hi guys. Hope U can help me...

Updated to KP v53 via HAM. Worked like a charm. Restarted device...and it won't boot up. It vibrates, then the Nokia logo appears and than it shut itself off. I have removed battery and tried again, got the same results.
Even have tried to flash it but my computer didn't recognised it. It says "Suitable USB device not found, waiting.".
It looks like it strugles to establish connection to a PC or a charger cuz from time to time it vibrates and than yellow led shines until it happens over and over again. Battery is fully charged and usb port is in order. Don't know what to do, please help.

Edit:

I have succeeded in flashing it. Will install everything and try again.