Arcade Otaku - アーケード オタク

What could be causing this?? it is very noticeable in person, hard to capture in video, I think I have read someone asking for this same issue a while before, but I don't remember where

ms8-26 or ms8-29?

Its a MS8-29

almost like the sharpness switch on the remote board is faulty or bad connection

I have tried with another remote board and it does the same.

I have read someone who had this same problem with these, not sure, memory may be playing tricks with me, I think it was in one of the facebook arcade related groups. and if I remember correctly he fixed it by replacing a ceramic cap, and it was you who suggested him to do so.

A little update:

I have been checking for burnt resistors and ceramic caps but found nothing, also tried reflowing some suspicious solder joints but that didn't do anything either,

I have not done anything to this chassis since then , and I had not turned on the monitor for weeks until today, and one thing I noticed is that the image was crushed to the center of the screen from both sides, and as time passed it started to stretch, correcting to the size I had left it adjusted last time I messed with it, I wonder if that might be cap related? or maybe the hoT that is on its legs???

If your chassis hasn't been recapped yet, it could be a good place to start.
Sorry for the obvious suggestion, but these can benefit greatly from a recap and it will likely fix one or both of your issues. If not, at least you'd have ruled that out

Yes.....I preffer no to go changing caps blindly, i.e: doing cap kits, it would be better for me to just replace those that are broken , so first I'll need to find where the problem is.

I have been told by the previous owner, the guy who "serviced" the chassis, that I must check the following:

-EW circuit, don't know what that is.

-drive transistor??

-gap diodes

-horizontal IC controller.

I will need hel indetifying these as I don't know what or where these are.