MD1 RGB flicker

[eliteshmupper]

Hi, I'm using the csync cable from RGC on my JP VA6 MD1 with original 220v MD1 PSU. Playing Landstalker from an Everdrive X5 I randomly get strange split-second flickers when walking around in the game, during which the image suddenly becomes brighter and more saturated. This flicker also happens every time upon entering or leaving a building in the game. When using composite this doesn't happen, and even on other games I have not observed this using RGB, so I don't think it's related to a bad SCART socket on the TV or something. I suppose it could be a cap issue with the console, but then again this system uses all Rubycon from what I can tell...

[Fudoh]

more likely a bad cap installed in the cable (in the sync line).

[eliteshmupper]

I tested all the caps in the cable with an ESR meter and nothing seems suspicious, they all read out as ~210µF and 0.65 Ohms ESR.

Edit: for some reason the issue seems to have mostly disappeared now.

[eliteshmupper]

I spoke too soon, the issue is still present. I read that this is due to the csync output on these consoles being TTL.

I also tested a few other CRTs and it looks like a lot of consumer CRTs don't take this well at all, they only display a grainy picture with interference running through the screen. The SNES seems more compatible than the MD but still some screens do have issues with that as well.

What's even worse though, I connected a PVM-1454QM and while it displayed the MD perfectly fine with the csync cable, connecting a PS1 resulted in the horizontal screen shaking issue which this monitor never had. Granted I've not used it for half a year or so before testing it now so it could be that the caps are finally worn out now but could this TTL csync theoretically damage a monitor?