weird issues on my sony crt tv

[denizkilic2002]

I dont know if this is the right place to post this topic or even right forum to be honest, but i really need help and i couldnt figure this out on my own. Sorry if i make any spelling errors by the way, english is not my native language. I bought a sony crt tv a few months ago, its model is trinitron kv-c2171d, to play ps2 and ps1 on it and i actually like the tv quite a bit, it has a rgb scart input which im using with my ps2, it has almost perfect geometry and its the perfect size. But i have some problems with it that i cannot solve, and there isnt any repair shops that fix crts around me, so i have to fix it myself. The tv shows whites as magenta-ish and blacks as green-ish, at first i thought maybe i have a bad green cathode, but i noticed something weird: when i first turn the tv on, just for a split second it shows black perfectly with osd on, but then it gets greenish again. https://www.youtube.com/watch?v=9GGFBh30TFU look at the 15th second to see what i mean. And if i turn a specific setting on the service menu off, the tv displays no image from the inputs but it displays the osd with perfect black background. Im comfortable around working with crts, any help will be appreciated.