Is this CRT behavior due to bad caps, or something else?

[cr4zymanz0r]

I've got a Sony Trinitron KV27FS100 that had been working without issue but now I get an "electric" looking interference that mostly shows up on bright white screens, but tends to gradually fade away if it sits at a white screen long enough. Here's a video of the behavior: https://www.youtube.com/watch?v=aFuMB-ZebCg

Now here's the history of the issue coming about:
1.) Everything worked fine weeks ago
2.) Did the RGB mod so it can accept RGB input, per the thread on these forums
3.) Still working fine, but then decided to adjust the TV in the service menu (horizontal and vertical position and sizing) due to me having an Omega CMVS, and parts of the image (usually life bars in fighting games) are cut off some when no displaying the overscan area. I set the TV to show the majority of the overscan area.
4.) At this point I was still testing the RGB input mod and saw the 'electric' inference some. I initially thought this might be a problem with the RGB input mod as it was the only input I was using at the time, it wasn't there the next round of testing after rewiring with some nice shielded wires, so I assumed everything was good and closed the TV back up.
5.) After getting everything hooked back up on my setup, I was noticing the interference again and it was taking a long while to go away. It was happening on any screen.
6.) I saw on an unrelated thread where someone was mentioning something else along the lines of "though you can adjust consumer CRTs to show overscan, it might not be a good idea. It depends on how good the capacitors still are". That made me suspicious, so I went and readjusted the screen close to how it was before to show far less of the overscan area. (austin532 from this thread http://shmups.system11.org/viewtopic.php?f=6&t=58529)
7.) After a little bit this cleared up the issue on most screens and continued to function that way for multiple days, even with the TV unplugged for 12+ hours between test sessions. However, it still does it on bright mostly white screens. If I let it sit there for maybe 20sec to a minute then it usually corrects itself and seems to be fine for the rest of my testing/gaming session, but returns after the TV has been off a while.

Between the overscan + capacitor comment mentioned in #6 and the whole 'warming up' process appearing to fix until powered off again for a while, this makes me suspicious that it might be the caps, but I'm also not very knowledgeable about the inner workings CRTs. I'd prefer some opinions from more CRT knowledgeable members before going on the potentially long and tedious route of replacing all the caps (I'd hate to spend all that time, then it turns out it wasn't the issue to begin with).

[ChuChu Flamingo]

I know on my KV27FS100l there is interference unless I turn the TILT_Correction in the menu to +5. I found the tip on here after wondering what was causing it.

[Taiyaki]

I know on my KV27FS100l there is interference unless I turn the TILT_Correction in the menu to +5. I found the tip on here after wondering what was causing it.

Yes actually I discovered this too. Did you see that from my message in another thread? I found all Trinitron models from the later years have this. The tilt function ads some internally induced interference. +5 (or wasn't -5?) is the only spot where it is entirely dropped. Most people aren't sensitive to this interference and therefor don't even notice it. Basically the menu tilt function was imperfect on these sets and to those who are bothered by it, you need to leave it at +5/-5 and adjust the tilt internally with the yoke to get it right.


That being said. What his problem is is clearly something else. If the set was modded for RGB I'm inclined to believe it might be related to that modification. Of course it could also be failing component (which should be fixable I would think). Hope someone else here can help you out. : /

[ChuChu Flamingo]

Yeah I read it up from you most likely. The tilt +5 isn't too bad on my set, not really too noticeable unless certain screens.

Kinda sucks the component inputs don't work on my TV, all I get is a flickering diagonal line (tried GC,Wii, and Neo Geo)

[cr4zymanz0r]

Looks like I completely forgot to mention in my original post that the interference is happening on multiple inputs: modded rgb, built-in component video, and built in composite.

Tilt on mine is just set to zero. Even if I changing the tilt would fix it (didn't seem to in the few moments I tried) that wouldn't be ideal since the sreen would then be tilted.

[Ikaruga11]

Trash it

[xeos]

Looks like I completely forgot to mention in my original post that the interference is happening on multiple inputs: modded rgb, built-in component video, and built in composite.

Tilt on mine is just set to zero. Even if I changing the tilt would fix it (didn't seem to in the few moments I tried) that wouldn't be ideal since the sreen would then be tilted.

If tilt means what I think it does, just tilt the set physically in the opposite direction.