OK… You have confirmed the problem is indeed inside the TV. So, we're back to my first guess. Either the blue bias or drive is out of adjustment. Somewhere inside your TV are Red, green and blue "drive" controls. I have NO idea where exactly since I can't even tell what make or model of TV it is and I probably wouldn't recognize it anyway.

It's impossible for me to really help beyond this from way over here.
Can you even see anything besides blue ever? If not, there could be an entirely different issue.

Good luck.

I have same issue no matter what i connect: Apple TV 1st gen, PS3, PS2
About why i ask this here is because people there might be familiar with crt quirks, due to one of the most popular mac os 9 machine having crt(iMac G3)
About twisting stuff inside: i cut out some plastic to access focus and some other knob on the side using non conductive screwdriver

Ignoring for a moment why you would be asking such a question on this forum…

I happen to have some background in CRT video. Your TV has what are called "bias" or "screen" controls. One for each of the three colors. It would appear (as if one could say with certainty from here) that the blue is out of adjustment.

THAT IS ONLY A FIRST GUESS AND NOT THE ONLY POSSIBLE ISSUE. I do NOT, repeat NOT recommend you start sticking your hand inside that old thing and begin twisting stuff around. There's at least a 90% chance you will get knocked on your butt.

It's also possible that your game console has a color problem. You should start by eliminating that possibility by testing the console with a different TV and/or a different source with the TV.
Maybe you have an old VCR or something that will connect to the TV to check the picture or even an digital–to–analog TV converter box.

I couldn't compress the image because these are quite old and i won't be able to find them again

I have 14 inch TV and it has issue of blue colour dominating the image, causing black to be blue etc and it's really annoying

Reference:
https://forums.macrumors.com/threads/how-to-install-macos9-on-unsupported-imac-g4-using-fw.2471707/?post=34302529#post-34302529

If you're having so much trouble with booting off of your Firewire drive, wouldn't it make sense to just buy a blank CD? I'm not saying you couldn't get the Firewire setup to work (so maybe you find my post unhelpful), but blank CDs are about 20 cents in the United States when bought in bulk. I don't know where you're posting from but surely they're not much more than that anywhere else... Maybe you could save yourself a lot of time and headache by just biting the bullet.

Hopefully someone gets back to work on the project... I thought after like 7 years they would have figured out how to get 2 GB of RAM usable. Pretty disappointing that the project seemly stopped like that.

It's pretty cool to see you folks get a whole 128 MB above the original limit. Hopefully progress has been made since 2017 - I wanna see if the limit was successfully increased to 2048 MB. Any news?

Nothing really changed. The available memory can't go past 0x68060000 because that's where the 68k Emulator's code lives. And there's several other well-known regions at 0x68080000 (the 68k Emulator's dispatch table), 0x68FFE000 (the Kernel Data Page), and 0x68FFF000 (the Emulator Data Page). Quite a few random parts of the Toolbox ROM and System File reference these parts of the address space, so they can't really be moved.

So increasing the limit further would need modifications to the Process Manager, and maybe the Memory Manager too. I'm pretty sure there were attempts to investigate them, but they petered out quite a while ago.

hi all, new to the forum. i'm trying to install OS 9 on my PowerBook 12" 867hz Aluminum, it looks like someone else on the forum achieved this but there's no info as to how. any and all links to useful information tell me that the topic is off limits to me? can anyone help me out with this?

as for the PB 12", i've used the unsupport G4 installer and restored the .iso to a FW external drive. i formatted the external to Mac OS X Extended and added OS 9 drivers, restored the .iso to the drive, but just get floppy disk question mark at boot. i tried blessing the system folder, no dice. any suggestions?