Question dark lcd

Joined
Jun 19, 2021
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Location
South korea
The backlight on the screen comes out well, but screen gets dark whenever there's a signal. What's the problem?

There was a time when the + and- of the lcd driver board were connected in reverse, but was it damaged then?

Or because did i accidentally leave the ps2 without a heat sink or pan for 30 minutes before and the GPU was damaged?
 
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