Hi, I own a satellite c660 , which has been working well except for the last three months. I recently tried to wipe the laptops memory clean using the instructions given by the Windows 10 operating system. Now, the laptop refuses to start up, I was able to enter the BIOS setup screen and changed the settings to default, but now even the screen that allows me to enter the BIOS setup screen does not show, just a continuos cycle of starting up and a lit up black screen with a lone underscore in the top left corner. The laptop is a few years old but if anyone help me salvage it would be much appreciated.