I too have the rev 2.1 board installed in my 7800. However, the composite on my flatpanel is loads better than the s-video. On s-vid I have horrible bleeding on the reds and lots of ghosting throughout. The effects are still present on the composite, but blend in much better and not nearly as noticeable. I also have the issue where the music on Commando is very hard to hear and will event change volume depending on what other sounds are playing at the same time.
The only difference I made to anything, was that I have the audio bridged across two RCAs so that I get sound from both the left and right. Not stereo, just added another RCA and have the wire split to both. I was thinking about maybe adding a capacitor in somewhere to see if that helps?
I will get some screen shots of the video artifacts I'm still getting on my 7800 later.
I did notice one other really strange thing. The composite by itself is better then RF, but not a defined as the S-video is. But the s-video has the ghosting and horrible color bleeding effects. The arches on the bridges in Commando really show this.
Now, if I have both the composite and the s-video plugged in at the same time but only view the composite, then the composite actually looks really good with more defined edges and more of the lighter colors showing up properly. The light colored specks in Dark Chambers are a good example.
I will need to take pics of those two games later to show what I'm talking about. Again it could be the age of the console used etc, but I'm not sure.
UPDATE: Here are some pics I took to show what I'm getting with the longhorn 2.1 mod from ElectronicSentimentalities...
This is Commando from my Dev OS modded 7800 on the RF:
Here is Commando from the Composite video out on my LHE modded 7800....
Here is Commando from the s-video out on my LHE modded 7800....
Notice in the s-video shots there is still some jailbars on the left edge of the image along with jailbars and ghosting that can be seen on the extreme right edge of the picture. Also notice the stills with the arches on the bridge on the s-video.. why is this happening?
Here are some shots of Dark Chambers on the same modded 7800... First is the s-video output. Not as bad as Commando, but you can still the ghosting on the right edge...
Here is the same shot from composite.... Notice the dots along the ground are no longer visible at all? I know the picture is blurry, but the image is so dark my camera has trouble getting a shot. Still it is good enough to show what I'm talking about.
And finally, this is the composite video out on Dark Chambers when I plug the s-video cable back up but leave it on the composite video out... Picture get clearer and the background dots have reappeared?!
I really want to like this mod board I received..but I'm just not getting the quality from it that I expect. Especially after the amazing difference the video mod board did in my 5200 and similar mods I've done on my Sega systems. But since I removed the RF modulator completely and the mods from LHE disable the RF anyway, I'm now stuck with this and pretty much use my other Dev OS 7800 instead on RF... Disappointed I am.
Edited by -^CrožBow^-, Tue Apr 8, 2014 11:25 PM.