Hello its a brand new display which i buy few days ago. But now im facing this 3 line issue what is the problem of this display??
How could we know, without knowing the code you use?
It may be an issue with the display, or with your code, or with the library you use.
Or even with the wiring. Show your wiring in a schematics drawing.
And provide a link to the display you bought.
Your processor looks like an STM32 blue pill. Please confirm.
I have a similar looking display that doesn't work with 3.3V processors.
It is made for 5V AVR Arduino. It has diodes and pull-ups as level converters to 3.3V.
But the reason could rather be the SPI bus speed, on second thought.
https://www.aliexpress.com/item/1005004237117445.html
But this one works, e.g. with ESP32 also:
https://www.aliexpress.com/item/1005004837312288.html
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