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Hello , thanks for the request
Let me know when you will be around
We just missed each other .
From your description if everything turns into an horizontal strip at the top then you have a defective lcd panel
Pull the lvds plug either at the main board or t-con and re-insert it without locking it in place then wiggle it while watching the screen , do you still see blinking only at the top of the screen ?
If so then you definitely have a bad panel
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