PS1/2 Modded PAL PS1 plays NTSC games with weird rainbow colours.

[ZeroInfinity]

So, yeah, my modded SCPH-1002 PS1 plays NTSC games with what I can only describe as a rainbow gradient across the screen, along with the colours just generally being f***ed up:

Spoiler: Pictures

My TV is picking it up us an NTSC signal. So I guess the PS1 is trying to output NTSC? But just... in rainbow? Could it be something to do with the modchip?
Now, I was mostly content using a bootdisc to play my imports. But I was just curious, is there some kind of fix for this? It would be convenient to not have to use the bootdisc every time I want to play a game and it would be nice to have the games playing at NTSC speed (although, this doesn't bug me too much.)
Just as long as the solution isn't a pain in the ass.

 

[daxtsu]

How do you have this console connected to your TV? According to the web, you either need an RGB SCART cable or do a hardmod (not a modchip) to fix the problem.

http://www.psxdev.net/forum/viewtopic.php?f=47&t=593

 

[ZeroInfinity]

How do you have this console connected to your TV? According to the web, you either need an RGB SCART cable or do a hardmod (not a modchip) to fix the problem.

http://www.psxdev.net/forum/viewtopic.php?f=47&t=593

It's connected with AV cables.
I'm not able to use a SCART cable. None of my TVs have a SCART port. I don't think I've even ever come across a TV with a SCART port. They're pretty uncommon in Australia for some reason.
It looks like it isn't going to be a simple fix... Oh well. I guess I might just have to stick with using my bootdisc.

 

[ZeroInfinity]

Wait a minute. I just realized something. On my old TV my PS1 played NTSC games in black and white. When I tried to find a fix to make the games play in colour, one of the solutions was to use the console on a HD TV, since HD TVs can accept both PAL and NTSC signals, or something like that, which my old TV couldn't... If that makes sense... I'm bad a explaning s**t. I could be remembering wrong.
Since I'm using a HD TV now... shouldn't there be no issues playing NTSC games in proper colour? I get the felling it is something to do with the mod chip...