Can anyone tell me why the screen on my laptop turns yellow? When I tap it or move it back and forth it goes back to a normal screen. It's been doing it for awhile but it's getting worse.

Try tapping or moving only the video cable going to the monitor, what happens
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First check: attach an external monitor. IF it shows the same problem, the video chip or card has failed.

if it doesn't yeah it may need reseating (re-attaching)

Can I do that with a laptop?

take the laptop apart in the area with ribbon connector is attached to the screen and the laptop. look for hairline cracks in the ribbon connector or where the connector sits on the board of both screen and laptop unit
Posted from my iPhone/Mobile device

Can I do that with a laptop?

depends if you have a separate graphics cable connection
for running a second monitor off the laptop

take the laptop apart in the area with ribbon connector is attached to the screen and the laptop. look for hairline cracks in the ribbon connector or where the connector sits on the board of both screen and laptop unit
Posted from my iPhone/Mobile device

If I can't put it back together can I give you a call?

YouTube it! I replaced my screen on a HP laptop with YouTube as my guide.
Posted from my iPhone/Mobile device

Probably just a loose cable
Posted from my iPhone/Mobile device

Thanks guys, I'll try the You Tube video.