Screen behaving weird

Hello, today I installed my SKR pro 1.2 board, but my screen is suddenly behaving weird. The screen has been working fine with my ramps board. I already tried a different screen and different cables without any luck. I am using a ‘RepRapDiscount Full Graphics Smart Controller’ from big tree tech. Can someone help me solve this problem? Thanks in advance.

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Well, that is a failure mode I haven’t seen before.

The skr pros are most commonly used with the tft35s. They have a “marlin mode” which is supposed to emulate that kind of screen and we enabled that screen in the software.

Someone on a different forum found the solution and i wanted to share it here for everyone who has the same problem. I had to change the timing variables in configuration.h to the following:

#define ST7920_DELAY_1 DELAY_NS(400)
#define ST7920_DELAY_2 DELAY_NS(400)
#define ST7920_DELAY_3 DELAY_NS(400)

Probably lower values will work to, i still have to check what’s the lowest value that works, but these values at least work!

Interesting. We have those values set in our firmware. But we only set 2 and 3 and we set them to 250. Sorry, I didn’t think that was the issue.

have same problem, this fix works for me