I have a Toshiba Satellite A305-S6864, model PSAGCU-02Q015 and when i go to turn on my laptop, it shows the Toshiba screen at the bottom where you can press F2 or F12 for the Boot Manager, but after that it goes to a blank screen with a blinking cursor. After a few minutes a double upside down L appears infront of the cursor. It looks kinda like a top right corner of a double picture frame. I have turned it off and turned it back on and this blank screen is all i get. It wont even go far enough for me to try a system restore or factore restore. Any ideas?