I decided to post my problem here after some time, maybe someone experienced something like this. I will give it a shot.
My PS2 is second hand and behave like that since i bought it.
Tech info: PS2 Slim, 77004, motherboard version: GH - 051-12.
Modbo modchip is removed.
The problem is that it freezes.
Black screen after boot logo. Console boots and wants to display second screen i.e. Browse/System settings, but it never shows that, all there is is a smooth fade to a black screen after boot logo.
Sound is still there, but console is unresponsive to any input.
Console successfully shows Browse/System settings screen, but few seconds after this it freezes. Rest is the same as before.
Scenario 3. I can go through both menus sometimes without the freeze. If you left it for a moment it will freeze.
Scenario 4. Pressing Triangle - Version on Browse/System settings screen freezes console every single time after one second. I can see all the software version numbers, but thats it.
Scenario 5. Any official game will freeze eventually. It can be 20 sec. or 4 minutes. Sound goes to infinite loop.
Scenario 6. DVD movie, usually 40 minutes of watching results in freeze.
Wierd thing here is that it NEVER freezes when using homebrew. Be that an CPU heavy emulator or SMS.
About freeze: It looks like even or odd fields are displayed all the time. So the interlacing still works, but only on type of lines are displayed in both fields on the screen. Result is low resolution and flickering.
Does anyone have any idea what can it be? Thanks.