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Posted by Paleface on November 14, 2018 at 17:38:10 EST in reply to Jailbars on RGB modded PCE are very common, I’m pretty sure across all models. People can fix it although I confess I don’t know much about it. Bad caps on Duo R are almost unheard of but are virtually guaranteed on the black systems. Perhaps there is *a* capacitor value that can be changed in order to fix the video but a total capacitor replacement is, I’m %99 sure, unrelated to the jailbar thing (which again, I’m pretty sure only happens with RGB modded systems) and unnecessary work which I personally don’t recommend anyone do because all it can do it break something if it already works perfectly. That goes for all sorts of things, not just game machines. (n/t) from SignOfZeta.

Google told me: it isn't related to RGB modding, it's just the clearer picture makes them more apparent; and it is 100% due to capacitors. And yeah it didn't seem to be a problem on my system--there's maybe(?) the faintest possible hint of it in this old screen photo I took (inside), so it wasn't a problem yet...but I didn't want to get the system back and then find it was a problem, or something (I'd also read something that seemed to say it gets worse over time?). So eh oh well I just hope I get the darn thing back and it works and the picture looks a little sharper than it did over composite.
 

The faint patterning in the middle-ish of that beam could very well just be some artifact of the old projector I was using there.
 
I've linked below the first page that comes up when googling pc engine jailbars. (Hm and then there's a thread discussing that page's jailbar fix here, with a lot of folks there performing it on their Duo-Rs and saying it improved things--so it sounds like at least some Duo-Rs can have the problem.)


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