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Need Some Help Restoring My TA-Backup on a ZU with a cracked/nonworking screen

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lun7200
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Default Need Some Help Restoring My TA-Backup on a ZU with a cracked/nonworking screen

I got a hairline crack in my ZU a few days ago while it was inside my pocket. Phone still boots up but the digitizer stopped functioning completely.

Apparently Sony is willing to replace the phone free of charge assuming it has no physical damage caused from a drop or something. I was running CM11 on an unlocked BL. I went ahead and flashed the 14.3.A.0.681 US Unbranded FW with flashtool and then locked the BL. Since the screen does not work, I cant enable USB debugging to restore the TA-Backup or install a recovery to get on ADB.

How can I enable usb debugging without having an input (if possible) or how can I install recovery using flashtool or fastboot on a phone without an input aside from the volume buttons?

Since the phone is already on a stock FW with a locked BL will Sony still detect a modified device?
 
bushako
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Get a Bluetooth mouse or a USB OTG cable and navigate to Developer Settings that way.
Nexus 5 - 32GB - D820 - latest 4.4.4 Mahdi ROM with Franco's Kernel

Sony Xperia Z Ultra - C6833 - White - Latest stock rom and kernel - rooted with Dual Recovery.
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