My toshiba satellite L70-C will not power up anymore. It last worked 3 days ago. I had to do a quick errand so I left my computer on. It past about 30 minutes when I came back to my computer. It was still on and working. Then I went to get something and came back to my computer. I thought my computer just fell asleep but I tried waking it up and it didn't respond. I tried holding the power button and it just blinked 3 times every 10 seconds.