From my understanding it takes longer than 30mins to cool down. If it works the same as CRT PC monitors they work based on temp.
You could always try to demag it yourself. Very easy to do imo (but needs to be done properly).
Degaussing - sorted.
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fagin
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- Joined: February 9th, 2009, 7:04 pm
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Devil Soundwave
- Doesn't go to eleven
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- eBay: DevilSoundwave
Re: Degaussing
Why not look at this degaussing thread that was all of 3 posts down?! 
http://www.arcadeotaku.com/forum/viewto ... f=4&t=2222
http://www.arcadeotaku.com/forum/viewto ... f=4&t=2222