After LCD installation (Brightness Issue )Experia Z topic

:confused:
my sony experia Z LTE C6603 Touch got cracked in my pocket ,
i took to mobile shop , they change my LCD+frame .
Now Brightness setting is not working anymore , i tried many time making zero to full brightness up & down .But
no change in brightness , Screen brightness is normal (not that much bright but okay ) .
Whenever im pressing power button screen goes off ( lock unlock working fine ) .
memeory card also not working :(

Now please guide me what to do next ?
any software issue ? bcoz they dismantle my mobile to fix the screen ? third-party launcher ?
need to hard-reset ?

Thanks in advance :o
Singh