Z1 screen blackout and total non-responsive after firmware update

[sparklypickle]

I don't know if this is related to yesterday's firmware update but today while I was using my Xperia Z1 this morning, the screen faded very quickly to black and now is totally black (but I can tell it is still on becasue if I tilt the screen it looks greyish). The on/off button does nothing, when I plug it in to charge, no response and when I plug it into the PC it is not recognised! HELP!!

[_alexdon_]

SOL23.

[sparklypickle]

Thanks, 

SOL23 is the japanese-only version of z1 right? the fact that the firmware model isnt the same makes me wonder if I can just live with it and see if it freaks out again (now that you kindly told me how to regain control of a catatonic Xperia ) 

[_alexdon_]

It seems that SOL23 fits with Z1 and not Z1s(C6916).You could try a repair.