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Turned my laptop on and a seen a green line a cross it.
Not sure why it there or what's wrong
You mean there is a horizontal green line across the screen?
This is almost certainly an indication of failing video hardware -- either the screen or the video chip or both.You need to connect an external monitor to the laptop.If the visual artifacts also appear on the monitor, then it is a failing video chip and since those are soldered to the motherboard, they are not replaceable.If the vistual artifacts do NOT appear on the monitor, then it is a failing laptop screen. While those can be replaced, the cost varies enormously by individual PC model.We are not able, or permitted, to provide any repair estimates or equipment prices.For this information, you would need to contact an HP Repair or Service Center.Since you live in the U.S., here is a link to the HP Service Repair Centers:https://www.service-center-locator.com/hp-hewlett-packard/hp-hewlett-packard-service-center.htmGood Luck
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