Weird patches of wavy lines

[armac911]

Hi. I have this strange problem that is occurring mainly on NTSC games (the console is PAL). There are patches or better said parts of screen that are covered with wavy lines, mainly on red and green color but others are not exception as well.

ModBo 735 chip is installed and I didn't really pay attention if this was happening prior to installing the chip or it came on after.

I tried to snap a photo , but its incredibly hard to capture a moving line :P but should give you the general idea.
Tried on 2 different TV sets (Sony Trinitron and Samsung) and tried another video cable as well.

Here is the pic.
Link removed. site has **** on it.

Any help / suggestion appreciated.
Thanks.

[Bootlegninja]

I removed that link since the site you use has **** on it. Please never do that agian.

[armac911]

Really? I haven't noticed it does...

[dlanor]

Hi. I have this strange problem that is occurring mainly on NTSC games (the console is PAL). There are patches or better said parts of screen that are covered with wavy lines, mainly on red and green color but others are not exception as well.

ModBo 735 chip is installed and I didn't really pay attention if this was happening prior to installing the chip or it came on after.

I tried to snap a photo , but its incredibly hard to capture a moving line :P but should give you the general idea.
Tried on 2 different TV sets (Sony Trinitron and Samsung) and tried another video cable as well.

What kind of video cable are you using ?

Composite and/or S-Video cables are subject to colour modulation interference in a way that will not occur for direct-video cable types So if you use either Component cables, or SCART-RGB that should not be a problem. But don't think you are safe just because of a SCART connector, as there are also SCART-composite variants. (The scart interface connector allows several different signal standards.)

Needless to say, switching from using one composite cable to using another of the same kind will not help at all. It is not the individual cable that is the problem, but the colour modulation method as such.

And modchips frequently enforce a video mode change to the local region standard, using a format called PAL60 to display games intended for NTSC, which can modify effects such as you describe. But if your TV set is capable of showing NTSC natively, like all my sets can do, then it is better to do that as it is what the games were designed for using. If you have any way of disabling the modchip that might allow you to run the games in their native video mode, though you may then need a softmod installed to run backup/import games at all. For that you can check out the FMCB subforum (Free MC Boot) inside the Homebrew/Dev forum.

It is also quite likely to be a combination of both the causes mentioned above, as the extra wiring used for modchip connection often causes additional 'crosstalk' of high-frequency signals, causing worsened colour modulation interference resulting in the visible patterns you saw.

If you are using composite cable today, then it is extremely likely that the problem can be completely eliminated simply by using component or SCART-RGB cable instead, so that is my primary suggestion. And of these two a component cable must be considered superior for two separate reasons.

1: Component cable does not have the 'Green-Screen' problem that plagues SCART-RGB for DVD-Video movies. (Though your modchip maybe fixes that too.)

2: Component cable is needed to make normal HDTV sets accept HDTV video modes used by the PS2 (such as 480p, 576p, 720p and 1080i).

Best regards: dlanor

[armac911]

Thanks for the very educational reply.

I am using composite cable and have a scart adapter with audio and composite female jacks in which i plug the composite out from the ps2. I also tried to connect the console directly (yellow composite in TV composite in) but the problem is still there.
I am going to listen to your advice and will get SCART direct cable tomorrow since I never watch DvD movies on my ps2 green tint shouldnt be a problem, and I think I saw green color fix in my modbo menu as well.

I can't change the PAL 60 setting on my chip unfortunately since the writing to CMOS option is disabled on Modbo 735.

I just hope the PS2 isn't broken after all the hard work I put in it.

Thanks again, off to electronics store once again.

P.S. FreeMcBoot isn't an option since its 90004 series console with 2.30 bios :P