I encountered a strange problem that happens quite often, but not everytime. When I boot up a PAL game with my N64 the image is very shaky, it seems as the picture is like a wave. This can especially be observed at the edge of the picture, I made a video of this which can be found here.
When this happens sometimes the screen goes black and comes back after a second (red LED does not flash, so sync is not completely gone). The issue can be resolved when I turn the OSSC off and on again, then the picture is calm and without issues. I’ve never encountered this with a NTSC game. What could the reason be?
I’m running a french RGB-modded N64. Until recently I used CSYNC from the S-RGB A chip by connecting it with the Multi AV out through a 470 Ohm resistor for syncing. For testing purposes I then went with Luma-Sync because of the proper 75 Ohm termination, but the issue happens with both kinds of syncing. I’ve already played with the H-PLL Pre- and Post-Coast settings, but I couldn’t resolve the issue. Does anyone have an idea?