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Reason for horizontal lines in hp laptop screen

Last response: in Windows 7
December 30, 2012 5:40:23 AM

I have a HP Dv series Laptop, It shows horizontal white lines and the lines gradually increased and now a unable to see the screen even to enter log in password. will you be able to help me understand this issue..
a b D Laptop
a b α HP
a b $ Windows 7
December 30, 2012 9:31:49 AM

It either needs a new screen or a new inverter board. HP laptops are unfortunately prone to hardware faults occurring.