After successfully recapping and replacing the Hybrid (thanks again @Androda ), I needed to correct one faulty matrix line of the display.
![IMG_3539.jpeg IMG_3539.jpeg](https://tinkerdifferent.com/data/attachments/13/13548-7ac1e2e58df7497ab879d7fee6ab0d2e.jpg)
I replaced the flat ribbon connector as it was torn at different places.
Unfortunately, same issue.
Checking the back of the display more carefully, I realized that there was a kind of corrosion under the protective adhesive.
I had this type of corrosion once in a LCII PSU, probably due to a bad board cleaning at manufacturing.
Sorry for the bad quality, my camera was out focus...
![2022_0102_043523_005.jpeg 2022_0102_043523_005.jpeg](https://tinkerdifferent.com/data/attachments/13/13549-aadda5a88b32b27da6faae707540c096.jpg)
![2022_0102_043615_006.jpeg 2022_0102_043615_006.jpeg](https://tinkerdifferent.com/data/attachments/13/13550-37c28d970302d207e8fd3950edcaf244.jpg)
To my surprise, after replacing the protective adhesive, pads were perfect!
![2022_0102_050503_014.jpeg 2022_0102_050503_014.jpeg](https://tinkerdifferent.com/data/attachments/13/13551-176cd8dbc95ddf12fa1e305b4dda9006.jpg)
Back to square one.
Checking the whole board, I realized that other areas have the same aspects.
![2022_0102_050726_015.jpeg 2022_0102_050726_015.jpeg](https://tinkerdifferent.com/data/attachments/13/13552-b175ebd0dda4fcd57869e8f954f47dec.jpg)
I plan to remove the protective adhesive from the additional places, but is it normal to have these solder connecting pads?
I have that at 4 different places on the board.
Thanks for your advices.
![IMG_3539.jpeg IMG_3539.jpeg](https://tinkerdifferent.com/data/attachments/13/13548-7ac1e2e58df7497ab879d7fee6ab0d2e.jpg)
I replaced the flat ribbon connector as it was torn at different places.
Unfortunately, same issue.
Checking the back of the display more carefully, I realized that there was a kind of corrosion under the protective adhesive.
I had this type of corrosion once in a LCII PSU, probably due to a bad board cleaning at manufacturing.
Sorry for the bad quality, my camera was out focus...
![2022_0102_043523_005.jpeg 2022_0102_043523_005.jpeg](https://tinkerdifferent.com/data/attachments/13/13549-aadda5a88b32b27da6faae707540c096.jpg)
![2022_0102_043615_006.jpeg 2022_0102_043615_006.jpeg](https://tinkerdifferent.com/data/attachments/13/13550-37c28d970302d207e8fd3950edcaf244.jpg)
To my surprise, after replacing the protective adhesive, pads were perfect!
![2022_0102_050503_014.jpeg 2022_0102_050503_014.jpeg](https://tinkerdifferent.com/data/attachments/13/13551-176cd8dbc95ddf12fa1e305b4dda9006.jpg)
Back to square one.
Checking the whole board, I realized that other areas have the same aspects.
![2022_0102_050726_015.jpeg 2022_0102_050726_015.jpeg](https://tinkerdifferent.com/data/attachments/13/13552-b175ebd0dda4fcd57869e8f954f47dec.jpg)
I plan to remove the protective adhesive from the additional places, but is it normal to have these solder connecting pads?
I have that at 4 different places on the board.
Thanks for your advices.
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