I just bought this used so I am crying now....worked for a day or 2 then froze up. Turned it off , when I turn it on, I can see the dell logo and I can F2 to the bios. But after the dell logo all I get is a few flashes of the cursor, then I see a small white vertical line that flashes once about 2 inches in and down , then nothing but a black screen. I tried to reload windows, but nothing. I've google it and tried powering down , taking out battery, etc. But nothing....HELP!!!!!