I have a Compaq Presario f500 series notebook PC, when i power it up, the power led and the touchpad led light up; and the fan hums as well. However, after a short period of time it powers up and attempts to reboot itself, it does this several times, but it never actually turns on. Before that when the computer was working, i was using the computer when the it suddenly froze and random horizantal white lines apeared until the screen turns white. please help me get the computer to work.
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