The definition of failure in the laptop: matrix or train?

Good time of day.

Tell: there was a Samsung laptop NP305V5A-S0CRU.
Everything was fine, but one summer just formed some kind of blue and pink stripes of different transparency from the bottom of the matrix and approximately the task bar height. Photos know.
Just formed from nothing. Not dropped, not hit, not flooded.
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For a year or more that thing hurts the eyes. Now come to deal with this problem.

Disassembled the laptop, cleaned everything, looked at the contacts from the ribbon cable to the Board - all normal. Disassembled the monitor, removed the matrix. Found interesting such a "guest" in the contacts. Tightly stuck the guy. How to get there is unknown.
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Cleaned the contacts, looked - there is no external sign of damage was found.
Include: stripes did not disappear.

These bands appear immediately at startup. Not a software problem.
If you cling the monitor via HDMI everything is fine on it without any bands.

And then I have the main question: what exactly is broken? The matrix itself, or all of the loop?
Afraid to buy train, throwing 1000 then it turned out that it wasn't him.
PS: the train - BA39-01134A. Matrix - LTN156AT18.
June 27th 19 at 15:04
3 answers
June 27th 19 at 15:06
Solution
Matrix.
Got any arguments? Why? - Matteo.Kuhn commented on June 27th 19 at 15:09
stripes characteristic of cracks in the matrix. The loop enables the transfer of data - if you break one wire may lose one of the colors high or even the picture disappears. - Iliana_Strosi commented on June 27th 19 at 15:12
: that is not repairable, only replacement of the matrix? - Matteo.Kuhn commented on June 27th 19 at 15:15
June 27th 19 at 15:08
Solution
Solved.
I just is at your own risk took it and picked up a matrix to its Acer Aspire 5750G. The train approached. The matrix has started. The lines are not lost. Something with the matrix. Deeper in this case I won't be able to climb =)
June 27th 19 at 15:10
Think not that and not another, because pareene decomposed on the pads of the connector, most likely what pins connector oxidized and train in these compounds "noise".
I can advise to conduct an audit of soldering. A simple soldering iron is not a ride, it should be able to.

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