@david31196 we really have to see what you built there. It does sound interesting. Now, here is the bad part. "but the screen soon started to flicker and bands went horizontally" is usually related to the LCD driver boards. Not turning on, is a power board issue. Again, we need to see all of it so we can try and see if we can help you further.
[guide|21499]
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=== Update (07/15/23) ===
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[image|3022670]
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The issues that you are having originates on the LCD driver board. There are Source drivers and Gate drivers. Source drivers are responsible for the vertical part and Gare drivers for the horizontal part. You will need to very carefully check the small ribbon cables that connect the Driver board to the LCD panel, for any small tears, loose connection to the panel etc. These ribbon cables are attached via a special process and are not replaceable. You really need to be gentle with those since they love to break and break the connection.
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It's not a matter of any shielding etc. It's a matter of not making connection or having a bad component.
@david31196 we really have to see what you built there. It does sound interesting. Now, here is the bad part. "but the screen soon started to flicker and bands went horizontally" is usually related to the LCD driver boards. Not turning on, is a power board issue. Again, we need to see all of it so we can try and see if we can help you further.
[guide|21499]