Hardware PSP 3000 has very bad scanlines

[XC-3730C]

The scanlines are heavily pronounced. This happened after I got this PSP and removed a badly jammed microSD adapter, and reassembled the PSP (I have disassembled many PSP's, and there is no internal damage).

Any idea how to fix this? I have already replaced the LCD screen, and no change.

 

[DinohScene]

Iirc, that was a problem with the 3000 PSPs.
The 2000's suffered from ghosting a lot and the 3000's from scanlines.

I honestly have no clue how it happens.

 

[XC-3730C]

This didn't happen until after I removed a badly jammed microSD adapter. Before that, the screen looked fine.

 

[XC-3730C]

Any ideas?

 

[zeello]

I had a similar issue when I disassembled and reassembled a japanese PSP 3000. The screen became fuzzy. It may be the ribbon cable for the LCD is not inserted right. Not sure. I broke the black tab that holds it in place so I had always assumed that was what caused it. (that piece is so easy to break)