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gigem2
01-09-2016, 09:58 PM
I have a G74SX-BBK7 that I bought new several years ago. Last week I took the laptop apart to clean it, more on that later...
When I put it back together, i noticed the screen had a weird blink. Any area of the screen that has a dark color, there are vertical and horizontal lines. These lines turn on and off at a continuous rate, approximately 2 times every three seconds. It's almost like the back-light has been turned up super bright and is showing through the colors.
I have ordered a new video cable, but am starting to think it is the screen based on the constant rate of the blinking.

Has anyone ever seen this before?

The lines are most visible in the white areas of the screen.
The lines are visible here...
http://i1299.photobucket.com/albums/ag66/gigem2/Tech%20Support/2043D6DE-4F8C-4E7D-AC70-13B81F992ECE_zpsxqoevkky.jpg

but not here
http://i1299.photobucket.com/albums/ag66/gigem2/Tech%20Support/99A2CC92-0C1F-4FB2-B8A2-8B8B24758FF9_zpstfmgyn0v.jpg

A closer view with the lines:
http://i1299.photobucket.com/albums/ag66/gigem2/Tech%20Support/F8EDEB98-77DF-4265-B3B6-8AD198D7264E_zps45v4vap1.jpg

A closer view without the lines:
http://i1299.photobucket.com/albums/ag66/gigem2/Tech%20Support/24FBD5A7-B4F7-442B-9103-0EF785BFE3DB_zpsv2guptyd.jpg

Almighty1
01-10-2016, 08:05 PM
It does sound like the power supply and possible the backlight is having issues.

C4RN1
01-10-2016, 11:53 PM
Did you reseat the lvds cable on the back of the screen? I had a G74 produce lines and reseating both sides of the lvds cable solved the problem.

gigem2
01-19-2016, 12:37 AM
New cable, no change.
New 1920x1080 screen, no problem!