My HP 2509m flat screen has gone in "flutter mode".

My HP 2509m flat screen has gone in "flutter mode".  Does it on any site and without any indication as to why.
It is intermitent but I have no control over it.

cherrykiss84,
Welocmne to the Apple Discussions!
A failing CRT is possible but a more plausible is that some external magnetic field source has caused the electron guns on the CRT to be thrown slightly out of alignment. Has anything drawing electrical power or containing a magnet been moved near the eMac recently? Move any nearby item further away from the eMac, then shut down and let the computer sit for 30 minutes or so. The do a cold start; that will force the eMac to perform it's screen degaussing routine. See if that combination helps.

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