This is usually caused by wearing down of some of the components in the video path. With proper troubleshooting they can be determined, and replaced. If the set is more than about 5 years or so, the cost may not be worth it. The labour can easily be more costly than the parts. After the set is serviced, there is no guarantee that there are no other parts that may soon fail.
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JANA
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"Aust_Powers" wrote in message
news:1122764354.780936.119400@o13g2000cwo.googlegroups.com...
I have a Mitsubishi 28 Inch Tv that has worked well for a few years,
however recently some ringing on the sharp edges of images has occured
and is getting slowly worse, is this a common fault? can anybody
diagnose this please! its driving me mad
Regards
Austin