It's not a program, but actually some test pictures. As I wrote above only the pure colors do not flicker : white, blue, red, yellow, turqoise, green... see my last post on page 1
Makes me somehow skeptic, if its really firmware thing...
Do you get flicker with batteries? and using a psu, does it go away?
I believe the issue may be with the soldering of the battery terminals. If the problem still persists when using a psu it may be a problem with the lcd or the board design.
I tested the baseball picture.
Following colors show the scanlines effect:
Dark Green
Dark Blue
Brown
All other colors do not show the scanlines effect.
So the scanlines effect has to do with purity and intensity(close affinity to one of the R G B Components) of the color.