Re: Swapping CRT in iMacs ?

[John Johnson]

Similar principle to the built-in degausser, but stronger. The built-in 
degausser is wired with a thermistor, When the monitor is cold and you 
turn it on, the degaussing coil comes on until the thermistor heats up 
(a few seconds). If you've ever turned a TV or monitor on and seen it 
"swimming" briefly, that's the degausser doing it's thing. It's 
basically a big electromagnet. The alternating current going into it 
from the wall plug switches the magnetic field from North to South 60 
times a second. That neutralizes any magnetism in the picture tube 
area. There is a particular "dance" you do with the coil, walking back 
and making ever-growing circles until you're about 3 meters away, at 
which point you turn and lay it on the floor, then turn it off.

Anyway, that's way more than you wanted to know. Any TV shop with any 
customers left will have one.

You can also try turning the Mac on and off several times, letting it 
cool a little in between times. I would guess at this point it won't 
help, since it has probably been turned on and off quite a few times 
since the problem was discovered.

Regards,
  JJ
Be Kind, Be Careful, Be Yourself

On Thursday, Sep 4, 2003, at 13:53 US/Eastern, Tekno Liber wrote:

From: John Johnson <[EMAIL PROTECTED]>

Take it to a DV shop and ask them to degauss it.
It will take them about 2 minutes.
Do they need extra equipment for that, or is it merely a button
on the inside of the iMac ? (similar to a monitor with a degauss
button o the front )


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