Share your experience!
my xperia z3 less than 6 months old was dropped from about 50 cm onto the floor of my house and now is dead?
tried everything from charging for 24 hours to the volume up and power and pc companion and even the reset button under the micro sd card flap
the phone shows no sign of life, no vibrations, no led flash, nothing!
it was working in perfect order before the drop.
i have also tried multiple chargers and cables, no luck!
is there anything else i could try
There's only one thing I can think of to suggest for you to try.
Remove both, the SIM and SD cards > connect the phone to a wall charger > press and hold power & volume up for 15 seconds > let it charge for 2 to 3 hours. I doubt this will work, perhaps something got damaged and/or disconnected from that drop.
nope that did nothing 
tried this, did not work 
meow_me0w, I advise contacting your local Sony Xperia Customer Care as soon as possible so your phone can be assessed - you can find contact details for the team in your region by clicking the link in my signature.
All your actions will not help to restore the phone. Your phone mechanical damage. Restore it can only be in service center. I suspect that could damage the motherboard