Problem with Sega cabinet monitor

[JetFire]

Hi! I have some problem with the monitor. My monitor is 15khz~31khz Hi res. Also the model # of the monitor is a Toshiba - A68KSM696X and the Sega part # is: 200-5710W (MS-2931-S). When I turn on the cabinet, there is a buzzing sound coming from the monitor. The longer I leave the monitor on the louder the noise gets. I opened the cover of the monitor and found that the noise is coming from the neck of the monitor. I would like to know what is the problem with my monitor, is there a part that is malfunctioning. please help! Thanks!!!

[JetFire]

Pic add about the cabinet monitor.

http://f2.pg.photos.yahoo.com/ph/evil_urien/detail?.dir=/b7af&.dnm=c624.jpg

[Ken Layton]

The part your picture points to is the "yoke". It contains two large deflection coils to move the electron beam vertically and horizontally. They are strong electromagnets and can make noise when the coil windings work loose. If the picture looks fine I'd leave it alone. Otherwise you may spend $100 for a new yoke and have to reconverge all the colors which is time-consumming.

[MonitorGuru]

If you can visibly see the windings that are loose, you can possibly fix it.  It's a bit abnormal, but throw down some high heat resistant glue on it.

Some people have used nail polish or Epoxy, though both can soften when warm.  Don't use consumer glue like Elmers, hot glue gun sticks, super glue or anything like that. You want something that hardens but doesn't necessarily require high strength, just density/no softening.

If you look at most yokes, there is a huge blob of black or reddish brown epoxy (like what are used for IC blobs) over most of the yoke windings. This is done by the manufacturer to prevent your problem from occuring over time.