Here are some cheaper strips.
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Edge lits are very finicky. I've had adhesive and fingerprints on the clear panel causing bright spots. Tears in the reflecting sheet can cause bright spots. If you have burn marks, they will need to be sanded down or the panel flipped.
Before reassembling completely, check for bright spots and dust or dirt by plugging in the TV with the cable between the main and PS disconnected to force the backlights on.
You can inspect the panel for damage with a flashlight. Cracks and non-uniform areas will be areas of damage.