Question LG LF43600 upper screen is dark after replacing led backlights

Sep 29, 2019
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This is an edge lit led tv with backlighting at the bottom. TV screen first became dark so I replaced backlight. But after replacing backlight, upper half of screen is darker. I suspect it maybe a misalignment of light guide. Also I may have incorrectly assembled the panel back. So, I would like to ask for assistance on the correct sequence of putting back the diffuser, light guide, etc.

Any feedback or comment is greatly appreciated.

Thanks!!!
 
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