From: http://linuxbsdos.com/2015/07/27/how-to-disable-secure-boot-on-a-lenovo-g50-laptop/

Then scroll to the Security tab by using → . Then use ↓ to scroll to the Secure Boot entry. 
Press the Enter key and select Disabled. Follow that by navigating to the Reset to Setup Mode 
entry using the ↓ again. Press Enter, then select Yes on the popup to clear the PK, disable 
secure boot and enter setup mode. You’ll notice that the Platform Mode changes to Setup Mode 
and Secure Boot Mode becomes Custom. Press the Fn+F10 key to reboot.

From: http://www.laptopmonitorrepair.com/toshiba_laptop_screen_repair.html?gclid=CLS7wci6qrgCFVRo7AodOxsA_w

Repair cracked screen: 170.00.

From: https://www.laptopscreen.com/English/model/Toshiba/SATELLITE~C855-S5308/

Number: https://www.laptopscreen.com/English/screen-part-number/LTN156AT24-T01/

New screen: 60.00 + 10 shipping.

From: http://www.screencountry.com/?section=videos&brand=Toshiba&id=135

Replacement video