Don't worry , you did everthing right.
What's wrong is pin 428 under the G.P.U
has unsoldered itself and killed the video.
There are many D.I.Y. fixes for this problem.
It's called a standerd X clamp mod ( on the G.P.U.
only). this will get your picture back.
hard to say for how long ,2-9 months.
Or you can have a repair shop re-flow the
G.P.U. for around 80.00 .that fix will last longer.
Rob
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