Installed a GBA IPS Funny Playing 3inch display. Originally (with original display) no issues, but now, although it works, the power led flashes between green and red - in particular when the display has a lot to do.
My guess is that the power was "dirty" originally, but didn't show up because the original screen didn't draw as much power. So I think it's a matter of cleaning up the power switch (possibly volume?) and… anywhere else?
Or could this be something else entirely?